251201130 has 32 divisors (see below), whose sum is σ = 603353664. Its totient is φ = 66934656.

The previous prime is 251201117. The next prime is 251201143. The reversal of 251201130 is 31102152.

It is an interprime number because it is at equal distance from previous prime (251201117) and next prime (251201143).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50014 + ... + 54806.

It is an arithmetic number, because the mean of its divisors is an integer number (18854802).

Almost surely, 2^251201130 is an apocalyptic number.

251201130 is an abundant number, since it is smaller than the sum of its proper divisors (352152534).

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

251201130 is a wasteful number, since it uses less digits than its factorization.

251201130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6550.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 251201130 is about 15849.3258531712. The cubic root of 251201130 is about 630.9677994892.

Adding to 251201130 its reverse (31102152), we get a palindrome (282303282).

The spelling of 251201130 in words is "two hundred fifty-one million, two hundred one thousand, one hundred thirty".