31545020554 has 4 divisors (see below), whose sum is σ = 47317530834. Its totient is φ = 15772510276.

The previous prime is 31545020539. The next prime is 31545020557. The reversal of 31545020554 is 45502054513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30865219225 + 679801329 = 175685^2 + 26073^2 .

It is not an unprimeable number, because it can be changed into a prime (31545020557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7886255137 + ... + 7886255140.

Almost surely, 2^31545020554 is an apocalyptic number.

31545020554 is a deficient number, since it is larger than the sum of its proper divisors (15772510280).

31545020554 is a wasteful number, since it uses less digits than its factorization.

31545020554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15772510279.

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 31545020554 in words is "thirty-one billion, five hundred forty-five million, twenty thousand, five hundred fifty-four".