31533432042 has 64 divisors (see below), whose sum is σ = 77484257280. Its totient is φ = 8353751616.

The previous prime is 31533432031. The next prime is 31533432043. The reversal of 31533432042 is 24023433513.

It is not an unprimeable number, because it can be changed into a prime (31533432043) 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, 382873 + ... + 457884.

It is an arithmetic number, because the mean of its divisors is an integer number (1210691520).

Almost surely, 2^31533432042 is an apocalyptic number.

31533432042 is an abundant number, since it is smaller than the sum of its proper divisors (45950825238).

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

31533432042 is a wasteful number, since it uses less digits than its factorization.

31533432042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840835.

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 31533432042 its reverse (24023433513), we get a palindrome (55556865555).

The spelling of 31533432042 in words is "thirty-one billion, five hundred thirty-three million, four hundred thirty-two thousand, forty-two".