31310312242 has 16 divisors (see below), whose sum is σ = 51732487872. Its totient is φ = 14093784720.

The previous prime is 31310312237. The next prime is 31310312291. The reversal of 31310312242 is 24221301313.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6906453 + ... + 6910984.

It is an arithmetic number, because the mean of its divisors is an integer number (3233280492).

Almost surely, 2^31310312242 is an apocalyptic number.

31310312242 is a deficient number, since it is larger than the sum of its proper divisors (20422175630).

31310312242 is a wasteful number, since it uses less digits than its factorization.

31310312242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13817553.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31310312242 its reverse (24221301313), we get a palindrome (55531613555).

The spelling of 31310312242 in words is "thirty-one billion, three hundred ten million, three hundred twelve thousand, two hundred forty-two".