251004024201 has 16 divisors (see below), whose sum is σ = 382553103744. Its totient is φ = 143404328064.

The previous prime is 251004024197. The next prime is 251004024221. The reversal of 251004024201 is 102420400152.

It is not a de Polignac number, because 251004024201 - 2² = 251004024197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (251004024221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 989490 + ... + 1217003.

It is an arithmetic number, because the mean of its divisors is an integer number (23909568984).

Almost surely, 2^251004024201 is an apocalyptic number.

251004024201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

251004024201 is a deficient number, since it is larger than the sum of its proper divisors (131549079543).

251004024201 is a wasteful number, since it uses less digits than its factorization.

251004024201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211920.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 251004024201 its reverse (102420400152), we get a palindrome (353424424353).

The spelling of 251004024201 in words is "two hundred fifty-one billion, four million, twenty-four thousand, two hundred one".