31213323130 has 32 divisors (see below), whose sum is σ = 61599657600. Its totient is φ = 11293254720.

The previous prime is 31213323107. The next prime is 31213323143. The reversal of 31213323130 is 3132331213.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691069 + ... + 734848.

It is an arithmetic number, because the mean of its divisors is an integer number (1924989300).

Almost surely, 2^31213323130 is an apocalyptic number.

31213323130 is a deficient number, since it is larger than the sum of its proper divisors (30386334470).

31213323130 is a wasteful number, since it uses less digits than its factorization.

31213323130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426134.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31213323130 its reverse (3132331213), we get a palindrome (34345654343).

The spelling of 31213323130 in words is "thirty-one billion, two hundred thirteen million, three hundred twenty-three thousand, one hundred thirty".