251260230 has 32 divisors (see below), whose sum is σ = 649412064. Its totient is φ = 61848576.

The previous prime is 251260201. The next prime is 251260231. The reversal of 251260230 is 32062152.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 251260197 and 251260206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251260231) 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, 321739 + ... + 322518.

It is an arithmetic number, because the mean of its divisors is an integer number (20294127).

Almost surely, 2^251260230 is an apocalyptic number.

251260230 is an abundant number, since it is smaller than the sum of its proper divisors (398151834).

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

251260230 is a wasteful number, since it uses less digits than its factorization.

251260230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644280.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 251260230 is about 15851.1901761350. The cubic root of 251260230 is about 631.0172781319.

The spelling of 251260230 in words is "two hundred fifty-one million, two hundred sixty thousand, two hundred thirty".