251116122 has 32 divisors (see below), whose sum is σ = 534139200. Its totient is φ = 78478848.

The previous prime is 251116109. The next prime is 251116147. The reversal of 251116122 is 221611152.

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 15 ways as a sum of consecutive naturals, for example, 297 + ... + 22412.

It is an arithmetic number, because the mean of its divisors is an integer number (16691850).

Almost surely, 2^251116122 is an apocalyptic number.

251116122 is an abundant number, since it is smaller than the sum of its proper divisors (283023078).

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

251116122 is a wasteful number, since it uses less digits than its factorization.

251116122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830.

The product of its digits is 240, while the sum is 21.

The square root of 251116122 is about 15846.6438718108. The cubic root of 251116122 is about 630.8966170039.

Adding to 251116122 its reverse (221611152), we get a palindrome (472727274).

The spelling of 251116122 in words is "two hundred fifty-one million, one hundred sixteen thousand, one hundred twenty-two".