31000025000023 has 4 divisors (see below), whose sum is σ = 31000115164120. Its totient is φ = 30999934835928.

The previous prime is 31000025000011. The next prime is 31000025000027. The reversal of 31000025000023 is 32000052000013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31000025000023 is a prime.

It is a super-2 number, since 2×31000025000023² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31000024999970 and 31000025000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000025000027) 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, 44564340 + ... + 45254617.

It is an arithmetic number, because the mean of its divisors is an integer number (7750028791030).

Almost surely, 2^{31000025000023} is an apocalyptic number.

31000025000023 is a deficient number, since it is larger than the sum of its proper divisors (90164097).

31000025000023 is an equidigital number, since it uses as much as digits as its factorization.

31000025000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90164096.

The product of its (nonzero) digits is 180, while the sum is 16.

Adding to 31000025000023 its reverse (32000052000013), we get a palindrome (63000077000036).

The spelling of 31000025000023 in words is "thirty-one trillion, twenty-five million, twenty-three", and thus it is an aban number and an uban number.