31545043450 has 12 divisors (see below), whose sum is σ = 58673780910. Its totient is φ = 12618017360.

The previous prime is 31545043441. The next prime is 31545043471. The reversal of 31545043450 is 5434054513.

It can be written as a sum of positive squares in 3 ways, for example, as 23025938049 + 8519105401 = 151743^2 + 92299^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315450385 + ... + 315450484.

Almost surely, 2^31545043450 is an apocalyptic number.

31545043450 is a deficient number, since it is larger than the sum of its proper divisors (27128737460).

31545043450 is a wasteful number, since it uses less digits than its factorization.

31545043450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630900881 (or 630900876 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 31545043450 its reverse (5434054513), we get a palindrome (36979097963).

The spelling of 31545043450 in words is "thirty-one billion, five hundred forty-five million, forty-three thousand, four hundred fifty".