251130732 has 48 divisors (see below), whose sum is σ = 621936000. Its totient is φ = 78596352.

The previous prime is 251130713. The next prime is 251130739. The reversal of 251130732 is 237031152.

It is not an unprimeable number, because it can be changed into a prime (251130739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100563 + ... + 103029.

It is an arithmetic number, because the mean of its divisors is an integer number (12957000).

Almost surely, 2^251130732 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 251130732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310968000).

251130732 is an abundant number, since it is smaller than the sum of its proper divisors (370805268).

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

251130732 is a wasteful number, since it uses less digits than its factorization.

251130732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 251130732 is about 15847.1048459963. The cubic root of 251130732 is about 630.9088520086.

Adding to 251130732 its reverse (237031152), we get a palindrome (488161884).

The spelling of 251130732 in words is "two hundred fifty-one million, one hundred thirty thousand, seven hundred thirty-two".