31223222342 has 32 divisors (see below), whose sum is σ = 50794400160. Its totient is φ = 14308968960.

The previous prime is 31223222339. The next prime is 31223222353. The reversal of 31223222342 is 24322232213.

It is a happy number.

It is a super-2 number, since 2×31223222342² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3859742 + ... + 3867822.

It is an arithmetic number, because the mean of its divisors is an integer number (1587325005).

Almost surely, 2^31223222342 is an apocalyptic number.

31223222342 is a deficient number, since it is larger than the sum of its proper divisors (19571177818).

31223222342 is a wasteful number, since it uses less digits than its factorization.

31223222342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9128.

The product of its digits is 6912, while the sum is 26.

Adding to 31223222342 its reverse (24322232213), we get a palindrome (55545454555).

The spelling of 31223222342 in words is "thirty-one billion, two hundred twenty-three million, two hundred twenty-two thousand, three hundred forty-two".