251139113 has 8 divisors (see below), whose sum is σ = 266309280. Its totient is φ = 236013120.

The previous prime is 251139107. The next prime is 251139121. The reversal of 251139113 is 311931152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251139113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251139103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1058 + ... + 22436.

It is an arithmetic number, because the mean of its divisors is an integer number (33288660).

Almost surely, 2^251139113 is an apocalyptic number.

It is an amenable number.

251139113 is a deficient number, since it is larger than the sum of its proper divisors (15170167).

251139113 is a wasteful number, since it uses less digits than its factorization.

251139113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22087.

The product of its digits is 810, while the sum is 26.

The square root of 251139113 is about 15847.3692769494. The cubic root of 251139113 is about 630.9158703827.

The spelling of 251139113 in words is "two hundred fifty-one million, one hundred thirty-nine thousand, one hundred thirteen".