31225896 has 96 divisors (see below), whose sum is σ = 92525160. Its totient is φ = 9455616.

The previous prime is 31225861. The next prime is 31225903. The reversal of 31225896 is 69852213.

31225896 is a `hidden beast` number, since 312 + 258 + 96 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27562500 + 3663396 = 5250^2 + 1914^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 31225896.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68100 + ... + 68556.

Almost surely, 2^31225896 is an apocalyptic number.

31225896 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31225896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46262580).

31225896 is an abundant number, since it is smaller than the sum of its proper divisors (61299264).

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

31225896 is a wasteful number, since it uses less digits than its factorization.

31225896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 548 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 31225896 is about 5588.0136005561. The cubic root of 31225896 is about 314.8992572777.

The spelling of 31225896 in words is "thirty-one million, two hundred twenty-five thousand, eight hundred ninety-six".