251424014013 has 20 divisors (see below), whose sum is σ = 382670518428. Its totient is φ = 164453440320.

The previous prime is 251424014003. The next prime is 251424014027. The reversal of 251424014013 is 310410424152.

251424014013 is a `hidden beast` number, since 2 + 5 + 14 + 240 + 1 + 401 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 146809286649 + 104614727364 = 383157^2 + 323442^2 .

It is not a de Polignac number, because 251424014013 - 2⁶ = 251424013949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251424014003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29278728 + ... + 29287313.

Almost surely, 2^251424014013 is an apocalyptic number.

It is an amenable number.

251424014013 is a deficient number, since it is larger than the sum of its proper divisors (131246504415).

251424014013 is an equidigital number, since it uses as much as digits as its factorization.

251424014013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58566106 (or 58566097 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 251424014013 its reverse (310410424152), we get a palindrome (561834438165).

The spelling of 251424014013 in words is "two hundred fifty-one billion, four hundred twenty-four million, fourteen thousand, thirteen".