251140633113 has 8 divisors (see below), whose sum is σ = 334869676288. Its totient is φ = 167419339344.

The previous prime is 251140633109. The next prime is 251140633141. The reversal of 251140633113 is 311336041152.

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

It is not a de Polignac number, because 251140633113 - 2² = 251140633109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251140633193) 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, 1861306 + ... + 1991667.

It is an arithmetic number, because the mean of its divisors is an integer number (41858709536).

Almost surely, 2^251140633113 is an apocalyptic number.

It is an amenable number.

251140633113 is a deficient number, since it is larger than the sum of its proper divisors (83729043175).

251140633113 is a wasteful number, since it uses less digits than its factorization.

251140633113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874703.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 251140633113 its reverse (311336041152), we get a palindrome (562476674265).

The spelling of 251140633113 in words is "two hundred fifty-one billion, one hundred forty million, six hundred thirty-three thousand, one hundred thirteen".