251244080101 has 32 divisors (see below), whose sum is σ = 302293555200. Its totient is φ = 204251974080.

The previous prime is 251244080057. The next prime is 251244080119. The reversal of 251244080101 is 101080442152.

It is not a de Polignac number, because 251244080101 - 2²³ = 251235691493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251244080101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251244086101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18090306 + ... + 18104188.

It is an arithmetic number, because the mean of its divisors is an integer number (9446673600).

Almost surely, 2^251244080101 is an apocalyptic number.

It is an amenable number.

251244080101 is a deficient number, since it is larger than the sum of its proper divisors (51049475099).

251244080101 is a wasteful number, since it uses less digits than its factorization.

251244080101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15489.

The product of its (nonzero) digits is 2560, while the sum is 28.

The spelling of 251244080101 in words is "two hundred fifty-one billion, two hundred forty-four million, eighty thousand, one hundred one".