31023142213242 has 32 divisors (see below), whose sum is σ = 65755953124992. Its totient is φ = 9723878311424.

The previous prime is 31023142213237. The next prime is 31023142213249. The reversal of 31023142213242 is 24231224132013.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31023142213249) 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, 138515478 + ... + 138739265.

It is an arithmetic number, because the mean of its divisors is an integer number (2054873535156).

Almost surely, 2^{31023142213242} is an apocalyptic number.

31023142213242 is an abundant number, since it is smaller than the sum of its proper divisors (34732810911750).

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

31023142213242 is a wasteful number, since it uses less digits than its factorization.

31023142213242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277255862.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 31023142213242 its reverse (24231224132013), we get a palindrome (55254366345255).

The spelling of 31023142213242 in words is "thirty-one trillion, twenty-three billion, one hundred forty-two million, two hundred thirteen thousand, two hundred forty-two".