251113422 has 16 divisors (see below), whose sum is σ = 573973632. Its totient is φ = 71746680.

The previous prime is 251113403. The next prime is 251113451. The reversal of 251113422 is 224311152.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2989404 + ... + 2989487.

It is an arithmetic number, because the mean of its divisors is an integer number (35873352).

Almost surely, 2^251113422 is an apocalyptic number.

251113422 is an abundant number, since it is smaller than the sum of its proper divisors (322860210).

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

251113422 is a wasteful number, since it uses less digits than its factorization.

251113422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5978903.

The product of its digits is 480, while the sum is 21.

The square root of 251113422 is about 15846.5586800415. The cubic root of 251113422 is about 630.8943558627.

Adding to 251113422 its reverse (224311152), we get a palindrome (475424574).

The spelling of 251113422 in words is "two hundred fifty-one million, one hundred thirteen thousand, four hundred twenty-two".