251063226 has 108 divisors (see below), whose sum is σ = 607406202. Its totient is φ = 77787216.

The previous prime is 251063209. The next prime is 251063243. The reversal of 251063226 is 622360152.

251063226 is a `hidden beast` number, since 2 + 5 + 1 + 0 + 632 + 26 = 666.

It is an interprime number because it is at equal distance from previous prime (251063209) and next prime (251063243).

It can be written as a sum of positive squares in only one way, i.e., 191850201 + 59213025 = 13851^2 + 7695^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 251063226.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 4737016 + ... + 4737068.

Almost surely, 2^251063226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251063226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303703101).

251063226 is an abundant number, since it is smaller than the sum of its proper divisors (356342976).

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

251063226 is an frugal number, since it uses more digits than its factorization.

251063226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 251063226 is about 15844.9747869790. The cubic root of 251063226 is about 630.8523157849.

The spelling of 251063226 in words is "two hundred fifty-one million, sixty-three thousand, two hundred twenty-six".