31213122342 has 32 divisors (see below), whose sum is σ = 63813422592. Its totient is φ = 10173587424.

The previous prime is 31213122341. The next prime is 31213122377. The reversal of 31213122342 is 24322131213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213122341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257593 + ... + 358859.

It is an arithmetic number, because the mean of its divisors is an integer number (1994169456).

Almost surely, 2^31213122342 is an apocalyptic number.

31213122342 is an abundant number, since it is smaller than the sum of its proper divisors (32600300250).

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

31213122342 is a wasteful number, since it uses less digits than its factorization.

31213122342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102412.

The product of its digits is 1728, while the sum is 24.

Adding to 31213122342 its reverse (24322131213), we get a palindrome (55535253555).

The spelling of 31213122342 in words is "thirty-one billion, two hundred thirteen million, one hundred twenty-two thousand, three hundred forty-two".