31000431122 has 32 divisors (see below), whose sum is σ = 49326424320. Its totient is φ = 14571193680.

The previous prime is 31000431101. The next prime is 31000431131. The reversal of 31000431122 is 22113400013.

It is a super-2 number, since 2×31000431122² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31000431122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4276433 + ... + 4283675.

It is an arithmetic number, because the mean of its divisors is an integer number (1541450760).

Almost surely, 2^31000431122 is an apocalyptic number.

31000431122 is a deficient number, since it is larger than the sum of its proper divisors (18325993198).

31000431122 is a wasteful number, since it uses less digits than its factorization.

31000431122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8118.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31000431122 its reverse (22113400013), we get a palindrome (53113831135).

The spelling of 31000431122 in words is "thirty-one billion, four hundred thirty-one thousand, one hundred twenty-two".