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31032145143451 = 174117824322311
BaseRepresentation
bin1110000111001001110111…
…11111001110011010011011
311001212122101112212122221201
413003210323333032122123
513031412313124042301
6145555545355415031
76351666325350514
oct703447377163233
9131778345778851
1031032145143451
119984727a22001
1235922a2754477
13144141b33571a
14793d6cab9a0b
1538c33d64c201
hex1c393bfce69b

31032145143451 has 4 divisors (see below), whose sum is σ = 31049969467504. Its totient is φ = 31014320819400.

The previous prime is 31032145143449. The next prime is 31032145143509. The reversal of 31032145143451 is 15434154123013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31032145143451 - 21 = 31032145143449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31032145143451.

It is not an unprimeable number, because it can be changed into a prime (31032145113451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8912159415 + ... + 8912162896.

It is an arithmetic number, because the mean of its divisors is an integer number (7762492366876).

Almost surely, 231032145143451 is an apocalyptic number.

31032145143451 is a deficient number, since it is larger than the sum of its proper divisors (17824324053).

31032145143451 is a wasteful number, since it uses less digits than its factorization.

31032145143451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17824324052.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 31032145143451 its reverse (15434154123013), we get a palindrome (46466299266464).

The spelling of 31032145143451 in words is "thirty-one trillion, thirty-two billion, one hundred forty-five million, one hundred forty-three thousand, four hundred fifty-one".

Divisors: 1 1741 17824322311 31032145143451