31913157023 has 8 divisors (see below), whose sum is σ = 34832805840. Its totient is φ = 28996583680.

The previous prime is 31913157007. The next prime is 31913157071. The reversal of 31913157023 is 32075131913.

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 31913157023 - 2⁴ = 31913157007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31910157023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747140 + ... + 788697.

It is an arithmetic number, because the mean of its divisors is an integer number (4354100730).

Almost surely, 2^31913157023 is an apocalyptic number.

31913157023 is a deficient number, since it is larger than the sum of its proper divisors (2919648817).

31913157023 is a wasteful number, since it uses less digits than its factorization.

31913157023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537737.

The product of its (nonzero) digits is 17010, while the sum is 35.

Adding to 31913157023 its reverse (32075131913), we get a palindrome (63988288936).

The spelling of 31913157023 in words is "thirty-one billion, nine hundred thirteen million, one hundred fifty-seven thousand, twenty-three".