31310220002 has 16 divisors (see below), whose sum is σ = 47196344832. Its totient is φ = 15578166240.

The previous prime is 31310220001. The next prime is 31310220043. The reversal of 31310220002 is 20002201313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31310220001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110443 + ... + 1138289.

It is an arithmetic number, because the mean of its divisors is an integer number (2949771552).

Almost surely, 2^31310220002 is an apocalyptic number.

31310220002 is a deficient number, since it is larger than the sum of its proper divisors (15886124830).

31310220002 is a wasteful number, since it uses less digits than its factorization.

31310220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30593.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31310220002 its reverse (20002201313), we get a palindrome (51312421315).

The spelling of 31310220002 in words is "thirty-one billion, three hundred ten million, two hundred twenty thousand, two".