31012040242 has 32 divisors (see below), whose sum is σ = 48633015600. Its totient is φ = 14812858368.

The previous prime is 31012040239. The next prime is 31012040243. The reversal of 31012040242 is 24204021013.

It can be written as a sum of positive squares in 8 ways, for example, as 5686818921 + 25325221321 = 75411^2 + 159139^2 .

It is not an unprimeable number, because it can be changed into a prime (31012040243) 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, 4039984 + ... + 4047652.

Almost surely, 2^31012040242 is an apocalyptic number.

31012040242 is a deficient number, since it is larger than the sum of its proper divisors (17620975358).

31012040242 is a wasteful number, since it uses less digits than its factorization.

31012040242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31012040242 its reverse (24204021013), we get a palindrome (55216061255).

The spelling of 31012040242 in words is "thirty-one billion, twelve million, forty thousand, two hundred forty-two".