251235130 has 16 divisors (see below), whose sum is σ = 453682944. Its totient is φ = 100169680.

The previous prime is 251235113. The next prime is 251235139. The reversal of 251235130 is 31532152.

It is a super-2 number, since 2×251235130² = 126238181092233800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (251235139) 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 7 ways as a sum of consecutive naturals, for example, 37282 + ... + 43501.

It is an arithmetic number, because the mean of its divisors is an integer number (28355184).

Almost surely, 2^251235130 is an apocalyptic number.

251235130 is a deficient number, since it is larger than the sum of its proper divisors (202447814).

251235130 is a wasteful number, since it uses less digits than its factorization.

251235130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81101.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 251235130 is about 15850.3984177055. The cubic root of 251235130 is about 630.9962653077.

Adding to 251235130 its reverse (31532152), we get a palindrome (282767282).

The spelling of 251235130 in words is "two hundred fifty-one million, two hundred thirty-five thousand, one hundred thirty".