31012320010 has 24 divisors (see below), whose sum is σ = 64936001700. Its totient is φ = 10632795264.

The previous prime is 31012319999. The next prime is 31012320013. The reversal of 31012320010 is 1002321013.

It can be written as a sum of positive squares in 2 ways, for example, as 30144251641 + 868068369 = 173621^2 + 29463^2 .

It is not an unprimeable number, because it can be changed into a prime (31012320013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31644735 + ... + 31645714.

Almost surely, 2^31012320010 is an apocalyptic number.

31012320010 is an abundant number, since it is smaller than the sum of its proper divisors (33923681690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31012320010 is a wasteful number, since it uses less digits than its factorization.

31012320010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63290470 (or 63290463 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31012320010 its reverse (1002321013), we get a palindrome (32014641023).

The spelling of 31012320010 in words is "thirty-one billion, twelve million, three hundred twenty thousand, ten".