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31300231031 = 563162134297
BaseRepresentation
bin11101001001101000…
…111001111101110111
32222210100220111000222
4131021220321331313
51003100324343111
622213520324555
72155435400606
oct351150717567
988710814028
1031300231031
1112302189933
12609647375b
132c4a881284
14172cdc9a3d
15c32d627db
hex749a39f77

31300231031 has 8 divisors (see below), whose sum is σ = 31376084784. Its totient is φ = 31224450240.

The previous prime is 31300230971. The next prime is 31300231033. The reversal of 31300231031 is 13013200313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31300231031 - 234 = 14120361847 is a prime.

It is a super-2 number, since 2×313002310312 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300231033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895475 + ... + 929771.

It is an arithmetic number, because the mean of its divisors is an integer number (3922010598).

Almost surely, 231300231031 is an apocalyptic number.

31300231031 is a deficient number, since it is larger than the sum of its proper divisors (75853753).

31300231031 is a wasteful number, since it uses less digits than its factorization.

31300231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36481.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31300231031 its reverse (13013200313), we get a palindrome (44313431344).

The spelling of 31300231031 in words is "thirty-one billion, three hundred million, two hundred thirty-one thousand, thirty-one".

Divisors: 1 563 1621 34297 912623 19309211 55595437 31300231031