31042404042 has 32 divisors (see below), whose sum is σ = 66867268608. Its totient is φ = 9550550976.

The previous prime is 31042404037. The next prime is 31042404049. The reversal of 31042404042 is 24040424013.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31042404049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1500823 + ... + 1521365.

It is an arithmetic number, because the mean of its divisors is an integer number (2089602144).

Almost surely, 2^31042404042 is an apocalyptic number.

31042404042 is an abundant number, since it is smaller than the sum of its proper divisors (35824864566).

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

31042404042 is a wasteful number, since it uses less digits than its factorization.

31042404042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39934.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 31042404042 its reverse (24040424013), we get a palindrome (55082828055).

The spelling of 31042404042 in words is "thirty-one billion, forty-two million, four hundred four thousand, forty-two".