31523404234 has 16 divisors (see below), whose sum is σ = 54371659968. Its totient is φ = 13427145792.

The previous prime is 31523404229. The next prime is 31523404309. The reversal of 31523404234 is 43240432513.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31523404196 and 31523404205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6904687 + ... + 6909250.

It is an arithmetic number, because the mean of its divisors is an integer number (3398228748).

Almost surely, 2^31523404234 is an apocalyptic number.

31523404234 is a deficient number, since it is larger than the sum of its proper divisors (22848255734).

31523404234 is a wasteful number, since it uses less digits than its factorization.

31523404234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13814109.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 31523404234 its reverse (43240432513), we get a palindrome (74763836747).

The spelling of 31523404234 in words is "thirty-one billion, five hundred twenty-three million, four hundred four thousand, two hundred thirty-four".