31523883897 has 48 divisors (see below), whose sum is σ = 48092861376. Its totient is φ = 18204480000.

The previous prime is 31523883889. The next prime is 31523883899. The reversal of 31523883897 is 79838832513.

It is a happy number.

It is not a de Polignac number, because 31523883897 - 2³ = 31523883889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31523883899) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2495397 + ... + 2507997.

It is an arithmetic number, because the mean of its divisors is an integer number (1001934612).

Almost surely, 2^31523883897 is an apocalyptic number.

It is an amenable number.

31523883897 is a deficient number, since it is larger than the sum of its proper divisors (16568977479).

31523883897 is a wasteful number, since it uses less digits than its factorization.

31523883897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12742 (or 12699 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The spelling of 31523883897 in words is "thirty-one billion, five hundred twenty-three million, eight hundred eighty-three thousand, eight hundred ninety-seven".