251220053299 has 12 divisors (see below), whose sum is σ = 268205194656. Its totient is φ = 235184707472.

The previous prime is 251220053291. The next prime is 251220053321. The reversal of 251220053299 is 992350022152.

It is not a de Polignac number, because 251220053299 - 2³ = 251220053291 is a prime.

It is a super-2 number, since 2×251220053299² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251220053291) 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 11 ways as a sum of consecutive naturals, for example, 5027224 + ... + 5076949.

It is an arithmetic number, because the mean of its divisors is an integer number (22350432888).

Almost surely, 2^251220053299 is an apocalyptic number.

251220053299 is a deficient number, since it is larger than the sum of its proper divisors (16985141357).

251220053299 is a wasteful number, since it uses less digits than its factorization.

251220053299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10104266 (or 10104243 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 251220053299 in words is "two hundred fifty-one billion, two hundred twenty million, fifty-three thousand, two hundred ninety-nine".