31213323230 has 16 divisors (see below), whose sum is σ = 58626764064. Its totient is φ = 11942488800.

The previous prime is 31213323223. The next prime is 31213323269. The reversal of 31213323230 is 3232331213.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 31213323196 and 31213323205.

It is a congruent number.

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, 67854821 + ... + 67855280.

It is an arithmetic number, because the mean of its divisors is an integer number (3664172754).

Almost surely, 2^31213323230 is an apocalyptic number.

31213323230 is a deficient number, since it is larger than the sum of its proper divisors (27413440834).

31213323230 is a wasteful number, since it uses less digits than its factorization.

31213323230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135710131.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31213323230 its reverse (3232331213), we get a palindrome (34445654443).

The spelling of 31213323230 in words is "thirty-one billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred thirty".