251530130 has 16 divisors (see below), whose sum is σ = 479387160. Its totient is φ = 94693632.

The previous prime is 251530099. The next prime is 251530163. The reversal of 251530130 is 31035152.

It can be written as a sum of positive squares in 4 ways, for example, as 251317609 + 212521 = 15853^2 + 461^2 .

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, 739625 + ... + 739964.

Almost surely, 2^251530130 is an apocalyptic number.

251530130 is a deficient number, since it is larger than the sum of its proper divisors (227857030).

251530130 is a wasteful number, since it uses less digits than its factorization.

251530130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479613.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 251530130 is about 15859.7014473791. The cubic root of 251530130 is about 631.2431404019.

Adding to 251530130 its reverse (31035152), we get a palindrome (282565282).

The spelling of 251530130 in words is "two hundred fifty-one million, five hundred thirty thousand, one hundred thirty".