251435130 has 32 divisors (see below), whose sum is σ = 606096000. Its totient is φ = 66754752.

The previous prime is 251435111. The next prime is 251435183. The reversal of 251435130 is 31534152.

It is a self number, because there is not a number n which added to its sum of digits gives 251435130.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11430 + ... + 25169.

It is an arithmetic number, because the mean of its divisors is an integer number (18940500).

Almost surely, 2^251435130 is an apocalyptic number.

251435130 is an abundant number, since it is smaller than the sum of its proper divisors (354660870).

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

251435130 is a wasteful number, since it uses less digits than its factorization.

251435130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36838.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 251435130 is about 15856.7061522877. The cubic root of 251435130 is about 631.1636593344.

Adding to 251435130 its reverse (31534152), we get a palindrome (282969282).

The spelling of 251435130 in words is "two hundred fifty-one million, four hundred thirty-five thousand, one hundred thirty".