251116413 has 8 divisors (see below), whose sum is σ = 338274048. Its totient is φ = 165684864.

The previous prime is 251116409. The next prime is 251116429. The reversal of 251116413 is 314611152.

It is a happy number.

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

It is not a de Polignac number, because 251116413 - 2² = 251116409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251116403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431181 + ... + 431762.

It is an arithmetic number, because the mean of its divisors is an integer number (42284256).

Almost surely, 2^251116413 is an apocalyptic number.

It is an amenable number.

251116413 is a deficient number, since it is larger than the sum of its proper divisors (87157635).

251116413 is an equidigital number, since it uses as much as digits as its factorization.

251116413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863043.

The product of its digits is 720, while the sum is 24.

The square root of 251116413 is about 15846.6530535631. The cubic root of 251116413 is about 630.8968607037.

Adding to 251116413 its reverse (314611152), we get a palindrome (565727565).

The spelling of 251116413 in words is "two hundred fifty-one million, one hundred sixteen thousand, four hundred thirteen".