251230442 has 8 divisors (see below), whose sum is σ = 377926500. Its totient is φ = 125254944.

The previous prime is 251230423. The next prime is 251230489. The reversal of 251230442 is 244032152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 248094001 + 3136441 = 15751^2 + 1771^2 .

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

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, 179267 + ... + 180662.

Almost surely, 2^251230442 is an apocalyptic number.

251230442 is a deficient number, since it is larger than the sum of its proper divisors (126696058).

251230442 is a wasteful number, since it uses less digits than its factorization.

251230442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360280.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 251230442 is about 15850.2505342976. The cubic root of 251230442 is about 630.9923405264.

Adding to 251230442 its reverse (244032152), we get a palindrome (495262594).

The spelling of 251230442 in words is "two hundred fifty-one million, two hundred thirty thousand, four hundred forty-two".