251244080099 has 4 divisors (see below), whose sum is σ = 251811222936. Its totient is φ = 250676937264.

The previous prime is 251244080057. The next prime is 251244080119. The reversal of 251244080099 is 990080442152.

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 251244080099 - 2²⁴ = 251227302883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251244088099) 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 3 ways as a sum of consecutive naturals, for example, 283570754 + ... + 283571639.

It is an arithmetic number, because the mean of its divisors is an integer number (62952805734).

Almost surely, 2^251244080099 is an apocalyptic number.

251244080099 is a deficient number, since it is larger than the sum of its proper divisors (567142837).

251244080099 is an equidigital number, since it uses as much as digits as its factorization.

251244080099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567142836.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 251244080099 in words is "two hundred fifty-one billion, two hundred forty-four million, eighty thousand, ninety-nine".