31516880193 has 32 divisors (see below), whose sum is σ = 50490155520. Its totient is φ = 19354533120.

The previous prime is 31516880183. The next prime is 31516880207. The reversal of 31516880193 is 39108861513.

It is a happy number.

It is not a de Polignac number, because 31516880193 - 2⁴ = 31516880177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31516880183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 708898 + ... + 752043.

It is an arithmetic number, because the mean of its divisors is an integer number (1577817360).

Almost surely, 2^31516880193 is an apocalyptic number.

It is an amenable number.

31516880193 is a deficient number, since it is larger than the sum of its proper divisors (18973275327).

31516880193 is a wasteful number, since it uses less digits than its factorization.

31516880193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461014 (or 1461008 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 31516880193 in words is "thirty-one billion, five hundred sixteen million, eight hundred eighty thousand, one hundred ninety-three".