31022320442 has 24 divisors (see below), whose sum is σ = 47807047200. Its totient is φ = 15097649760.

The previous prime is 31022320429. The next prime is 31022320493. The reversal of 31022320442 is 24402322013.

It is a super-2 number, since 2×31022320442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1465409 + ... + 1486427.

It is an arithmetic number, because the mean of its divisors is an integer number (1991960300).

Almost surely, 2^31022320442 is an apocalyptic number.

31022320442 is a deficient number, since it is larger than the sum of its proper divisors (16784726758).

31022320442 is a wasteful number, since it uses less digits than its factorization.

31022320442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21542 (or 21501 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31022320442 its reverse (24402322013), we get a palindrome (55424642455).

The spelling of 31022320442 in words is "thirty-one billion, twenty-two million, three hundred twenty thousand, four hundred forty-two".