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31032145143450 = 23252113277187043
BaseRepresentation
bin1110000111001001110111…
…11111001110011010011010
311001212122101112212122221200
413003210323333032122122
513031412313124042300
6145555545355415030
76351666325350513
oct703447377163232
9131778345778850
1031032145143450
119984727a22000
1235922a2754476
13144141b335719
14793d6cab9a0a
1538c33d64c200
hex1c393bfce69a

31032145143450 has 288 divisors, whose sum is σ = 92035622682432. Its totient is φ = 7495745558400.

The previous prime is 31032145143449. The next prime is 31032145143509. The reversal of 31032145143450 is 5434154123013.

31032145143450 is a `hidden beast` number, since 3 + 1 + 0 + 3 + 21 + 45 + 143 + 450 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 165815629 + ... + 166002671.

It is an arithmetic number, because the mean of its divisors is an integer number (319568134314).

Almost surely, 231032145143450 is an apocalyptic number.

31032145143450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31032145143450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46017811341216).

31032145143450 is an abundant number, since it is smaller than the sum of its proper divisors (61003477538982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31032145143450 is a wasteful number, since it uses less digits than its factorization.

31032145143450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187371 (or 187341 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 31032145143450 its reverse (5434154123013), we get a palindrome (36466299266463).

The spelling of 31032145143450 in words is "thirty-one trillion, thirty-two billion, one hundred forty-five million, one hundred forty-three thousand, four hundred fifty".