251140434 has 8 divisors (see below), whose sum is σ = 502280880. Its totient is φ = 83713476.

The previous prime is 251140399. The next prime is 251140459. The reversal of 251140434 is 434041152.

251140434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

251140434 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20928364 + ... + 20928375.

It is an arithmetic number, because the mean of its divisors is an integer number (62785110).

Almost surely, 2^251140434 is an apocalyptic number.

251140434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

251140434 is a wasteful number, since it uses less digits than its factorization.

251140434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41856744.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 251140434 is about 15847.4109557366. The cubic root of 251140434 is about 630.9169765935.

Adding to 251140434 its reverse (434041152), we get a palindrome (685181586).

The spelling of 251140434 in words is "two hundred fifty-one million, one hundred forty thousand, four hundred thirty-four".