31012213323 has 32 divisors (see below), whose sum is σ = 53104536576. Its totient is φ = 15646866048.

The previous prime is 31012213321. The next prime is 31012213333. The reversal of 31012213323 is 32331221013.

It is not a de Polignac number, because 31012213323 - 2¹ = 31012213321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31012213323.

It is not an unprimeable number, because it can be changed into a prime (31012213321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2463240 + ... + 2475797.

It is an arithmetic number, because the mean of its divisors is an integer number (1659516768).

Almost surely, 2^31012213323 is an apocalyptic number.

31012213323 is a deficient number, since it is larger than the sum of its proper divisors (22092323253).

31012213323 is a wasteful number, since it uses less digits than its factorization.

31012213323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939083.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31012213323 its reverse (32331221013), we get a palindrome (63343434336).

The spelling of 31012213323 in words is "thirty-one billion, twelve million, two hundred thirteen thousand, three hundred twenty-three".