251054242 has 4 divisors (see below), whose sum is σ = 376581366. Its totient is φ = 125527120.

The previous prime is 251054233. The next prime is 251054267. The reversal of 251054242 is 242450152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 232898121 + 18156121 = 15261^2 + 4261^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62763559 + ... + 62763562.

Almost surely, 2^251054242 is an apocalyptic number.

251054242 is a deficient number, since it is larger than the sum of its proper divisors (125527124).

251054242 is a wasteful number, since it uses less digits than its factorization.

251054242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125527123.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 251054242 is about 15844.6912876206. The cubic root of 251054242 is about 630.8447909277.

The spelling of 251054242 in words is "two hundred fifty-one million, fifty-four thousand, two hundred forty-two".