251232042 has 8 divisors (see below), whose sum is σ = 502464096. Its totient is φ = 83744012.

The previous prime is 251232011. The next prime is 251232053. The reversal of 251232042 is 240232152.

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

251232042 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20935998 + ... + 20936009.

It is an arithmetic number, because the mean of its divisors is an integer number (62808012).

Almost surely, 2^251232042 is an apocalyptic number.

251232042 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.

251232042 is a wasteful number, since it uses less digits than its factorization.

251232042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41872012.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 251232042 is about 15850.3010066055. The cubic root of 251232042 is about 630.9936800477.

Adding to 251232042 its reverse (240232152), we get a palindrome (491464194).

The spelling of 251232042 in words is "two hundred fifty-one million, two hundred thirty-two thousand, forty-two".