31953996145 has 12 divisors (see below), whose sum is σ = 39005743860. Its totient is φ = 25129908704.

The previous prime is 31953996133. The next prime is 31953996167. The reversal of 31953996145 is 54169935913.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13427247376 + 18526748769 = 115876^2 + 136113^2 .

It is not a de Polignac number, because 31953996145 - 2²³ = 31945607537 is a prime.

It is a super-2 number, since 2×31953996145² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 900550 + ... + 935359.

It is an arithmetic number, because the mean of its divisors is an integer number (3250478655).

Almost surely, 2^31953996145 is an apocalyptic number.

It is an amenable number.

31953996145 is a deficient number, since it is larger than the sum of its proper divisors (7051747715).

31953996145 is an equidigital number, since it uses as much as digits as its factorization.

31953996145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836032 (or 1835973 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 55.

The spelling of 31953996145 in words is "thirty-one billion, nine hundred fifty-three million, nine hundred ninety-six thousand, one hundred forty-five".