251116351 has 4 divisors (see below), whose sum is σ = 251239104. Its totient is φ = 250993600.

The previous prime is 251116343. The next prime is 251116357. The reversal of 251116351 is 153611152.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 251116351 - 2³ = 251116343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251116357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58255 + ... + 62416.

It is an arithmetic number, because the mean of its divisors is an integer number (62809776).

Almost surely, 2^251116351 is an apocalyptic number.

251116351 is a deficient number, since it is larger than the sum of its proper divisors (122753).

251116351 is a wasteful number, since it uses less digits than its factorization.

251116351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122752.

The product of its digits is 900, while the sum is 25.

The square root of 251116351 is about 15846.6510973139. The cubic root of 251116351 is about 630.8968087814.

The spelling of 251116351 in words is "two hundred fifty-one million, one hundred sixteen thousand, three hundred fifty-one".