31020200042 has 8 divisors (see below), whose sum is σ = 50109553956. Its totient is φ = 14317015392.

The previous prime is 31020200023. The next prime is 31020200047. The reversal of 31020200042 is 24000202013.

It can be written as a sum of positive squares in 2 ways, for example, as 30345291601 + 674908441 = 174199^2 + 25979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31020200047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596542283 + ... + 596542334.

Almost surely, 2^31020200042 is an apocalyptic number.

31020200042 is a deficient number, since it is larger than the sum of its proper divisors (19089353914).

31020200042 is a wasteful number, since it uses less digits than its factorization.

31020200042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193084632.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 31020200042 its reverse (24000202013), we get a palindrome (55020402055).

The spelling of 31020200042 in words is "thirty-one billion, twenty million, two hundred thousand, forty-two".