31322420312 has 32 divisors (see below), whose sum is σ = 59020088400. Its totient is φ = 15583810944.

The previous prime is 31322420291. The next prime is 31322420317. The reversal of 31322420312 is 21302422313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322420317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4094363 + ... + 4102005.

Almost surely, 2^31322420312 is an apocalyptic number.

It is an amenable number.

31322420312 is a deficient number, since it is larger than the sum of its proper divisors (27697668088).

31322420312 is a wasteful number, since it uses less digits than its factorization.

31322420312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10115 (or 10111 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31322420312 its reverse (21302422313), we get a palindrome (52624842625).

The spelling of 31322420312 in words is "thirty-one billion, three hundred twenty-two million, four hundred twenty thousand, three hundred twelve".