31422256 has 20 divisors (see below), whose sum is σ = 64462392. Its totient is φ = 14786816.

The previous prime is 31422241. The next prime is 31422289. The reversal of 31422256 is 65222413.

It is a self number, because there is not a number n which added to its sum of digits gives 31422256.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57490 + ... + 58033.

Almost surely, 2^31422256 is an apocalyptic number.

It is an amenable number.

31422256 is an abundant number, since it is smaller than the sum of its proper divisors (33040136).

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

31422256 is a wasteful number, since it uses less digits than its factorization.

31422256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115548 (or 115542 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 31422256 is about 5605.5558154388. Note that the first 3 decimals coincide. The cubic root of 31422256 is about 315.5579462301.

Adding to 31422256 its reverse (65222413), we get a palindrome (96644669).

The spelling of 31422256 in words is "thirty-one million, four hundred twenty-two thousand, two hundred fifty-six".