251285272 has 32 divisors (see below), whose sum is σ = 545853600. Its totient is φ = 106216704.

The previous prime is 251285213. The next prime is 251285299. The reversal of 251285272 is 272582152.

It is a super-2 number, since 2×251285272² = 126288575848227968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26647 + ... + 34822.

It is an arithmetic number, because the mean of its divisors is an integer number (17057925).

Almost surely, 2^251285272 is an apocalyptic number.

It is an amenable number.

251285272 is an abundant number, since it is smaller than the sum of its proper divisors (294568328).

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

251285272 is a wasteful number, since it uses less digits than its factorization.

251285272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61555 (or 61551 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 251285272 is about 15851.9800655943. The cubic root of 251285272 is about 631.0382410061.

The spelling of 251285272 in words is "two hundred fifty-one million, two hundred eighty-five thousand, two hundred seventy-two".