251403130415291 has 4 divisors (see below), whose sum is σ = 252719377171584. Its totient is φ = 250086883659000.

The previous prime is 251403130415279. The next prime is 251403130415293. The reversal of 251403130415291 is 192514031304152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251403130415291 is a prime.

It is a super-2 number, since 2×251403130415291² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251403130415293) 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, 658123377860 + ... + 658123378241.

It is an arithmetic number, because the mean of its divisors is an integer number (63179844292896).

Almost surely, 2^{251403130415291} is an apocalyptic number.

251403130415291 is a deficient number, since it is larger than the sum of its proper divisors (1316246756293).

251403130415291 is a wasteful number, since it uses less digits than its factorization.

251403130415291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316246756292.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 251403130415291 in words is "two hundred fifty-one trillion, four hundred three billion, one hundred thirty million, four hundred fifteen thousand, two hundred ninety-one".