251025228 has 72 divisors (see below), whose sum is σ = 670365696. Its totient is φ = 79077600.

The previous prime is 251025227. The next prime is 251025239. The reversal of 251025228 is 822520152.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (251025227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45373 + ... + 50603.

Almost surely, 2^251025228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251025228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335182848).

251025228 is an abundant number, since it is smaller than the sum of its proper divisors (419340468).

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

251025228 is a wasteful number, since it uses less digits than its factorization.

251025228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5315 (or 5310 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 251025228 is about 15843.7756863697. The cubic root of 251025228 is about 630.8204880310.

The spelling of 251025228 in words is "two hundred fifty-one million, twenty-five thousand, two hundred twenty-eight".