251432260 has 24 divisors (see below), whose sum is σ = 529182360. Its totient is φ = 100349184.

The previous prime is 251432243. The next prime is 251432267. The reversal of 251432260 is 62234152.

It can be written as a sum of positive squares in 4 ways, for example, as 15256836 + 236175424 = 3906^2 + 15368^2 .

It is not an unprimeable number, because it can be changed into a prime (251432267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4615 + ... + 22894.

It is an arithmetic number, because the mean of its divisors is an integer number (22049265).

Almost surely, 2^251432260 is an apocalyptic number.

251432260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251432260 is an abundant number, since it is smaller than the sum of its proper divisors (277750100).

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

251432260 is a wasteful number, since it uses less digits than its factorization.

251432260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27975 (or 27973 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 251432260 is about 15856.6156540417. The cubic root of 251432260 is about 631.1612578580.

The spelling of 251432260 in words is "two hundred fifty-one million, four hundred thirty-two thousand, two hundred sixty".