631331226 has 64 divisors (see below), whose sum is σ = 1426550400. Its totient is φ = 206938368.

The previous prime is 631331191. The next prime is 631331249. The reversal of 631331226 is 622133136.

It is a happy number.

631331226 is a `hidden beast` number, since 631 + 3 + 3 + 1 + 2 + 26 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 631331226.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 957685 + ... + 958343.

It is an arithmetic number, because the mean of its divisors is an integer number (22289850).

Almost surely, 2^631331226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631331226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713275200).

631331226 is an abundant number, since it is smaller than the sum of its proper divisors (795219174).

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

631331226 is a wasteful number, since it uses less digits than its factorization.

631331226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 934 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 631331226 is about 25126.3054586224. The cubic root of 631331226 is about 857.8652778838.

The spelling of 631331226 in words is "six hundred thirty-one million, three hundred thirty-one thousand, two hundred twenty-six".