31326542145 has 12 divisors (see below), whose sum is σ = 54299339796. Its totient is φ = 16707489120.

The previous prime is 31326542129. The next prime is 31326542147. The reversal of 31326542145 is 54124562313.

31326542145 is a `hidden beast` number, since 3 + 132 + 65 + 421 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11825257536 + 19501284609 = 108744^2 + 139647^2 .

It is not a de Polignac number, because 31326542145 - 2⁴ = 31326542129 is a prime.

It is a super-2 number, since 2×31326542145² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31326542147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348072646 + ... + 348072735.

It is an arithmetic number, because the mean of its divisors is an integer number (4524944983).

Almost surely, 2^31326542145 is an apocalyptic number.

It is an amenable number.

31326542145 is a deficient number, since it is larger than the sum of its proper divisors (22972797651).

31326542145 is a wasteful number, since it uses less digits than its factorization.

31326542145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696145392 (or 696145389 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 31326542145 in words is "thirty-one billion, three hundred twenty-six million, five hundred forty-two thousand, one hundred forty-five".