31542535040 has 32 divisors (see below), whose sum is σ = 75406374360. Its totient is φ = 12617013760.

The previous prime is 31542535019. The next prime is 31542535091. The reversal of 31542535040 is 4053524513.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 31542534988 and 31542535006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24641966 + ... + 24643245.

Almost surely, 2^31542535040 is an apocalyptic number.

It is an amenable number.

31542535040 is an abundant number, since it is smaller than the sum of its proper divisors (43863839320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31542535040 is an equidigital number, since it uses as much as digits as its factorization.

31542535040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49285230 (or 49285218 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 31542535040 in words is "thirty-one billion, five hundred forty-two million, five hundred thirty-five thousand, forty".