31311213230 has 16 divisors (see below), whose sum is σ = 61483837104. Its totient is φ = 11385895680.

The previous prime is 31311213181. The next prime is 31311213251. The reversal of 31311213230 is 3231211313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142323587 + ... + 142323806.

It is an arithmetic number, because the mean of its divisors is an integer number (3842739819).

Almost surely, 2^31311213230 is an apocalyptic number.

31311213230 is a deficient number, since it is larger than the sum of its proper divisors (30172623874).

31311213230 is a wasteful number, since it uses less digits than its factorization.

31311213230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284647411.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31311213230 its reverse (3231211313), we get a palindrome (34542424543).

The spelling of 31311213230 in words is "thirty-one billion, three hundred eleven million, two hundred thirteen thousand, two hundred thirty".