251120232 has 48 divisors (see below), whose sum is σ = 741948480. Its totient is φ = 76096800.

The previous prime is 251120227. The next prime is 251120237. The reversal of 251120232 is 232021152.

It is an interprime number because it is at equal distance from previous prime (251120227) and next prime (251120237).

It is a super-2 number, since 2×251120232² = 126122741839467648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (251120237) 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 11 ways as a sum of consecutive naturals, for example, 157744 + ... + 159327.

It is an arithmetic number, because the mean of its divisors is an integer number (15457260).

Almost surely, 2^251120232 is an apocalyptic number.

251120232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

251120232 is an abundant number, since it is smaller than the sum of its proper divisors (490828248).

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

251120232 is a wasteful number, since it uses less digits than its factorization.

251120232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317094 (or 317087 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 251120232 is about 15846.7735517360. The cubic root of 251120232 is about 630.9000589320.

Adding to 251120232 its reverse (232021152), we get a palindrome (483141384).

The spelling of 251120232 in words is "two hundred fifty-one million, one hundred twenty thousand, two hundred thirty-two".