251535452 has 96 divisors (see below), whose sum is σ = 563297280. Its totient is φ = 95800320.

The previous prime is 251535439. The next prime is 251535461. The reversal of 251535452 is 254535152.

It is a super-2 number, since 2×251535452² = 126540167225688608, 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 31 ways as a sum of consecutive naturals, for example, 746228 + ... + 746564.

It is an arithmetic number, because the mean of its divisors is an integer number (5867680).

Almost surely, 2^251535452 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 251535452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281648640).

251535452 is an abundant number, since it is smaller than the sum of its proper divisors (311761828).

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

251535452 is a wasteful number, since it uses less digits than its factorization.

251535452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 449 counting only the distinct ones).

The product of its digits is 30000, while the sum is 32.

The square root of 251535452 is about 15859.8692302301. The cubic root of 251535452 is about 631.2475924229.

The spelling of 251535452 in words is "two hundred fifty-one million, five hundred thirty-five thousand, four hundred fifty-two".