251151315241 has 4 divisors (see below), whose sum is σ = 251193270672. Its totient is φ = 251109359812.

The previous prime is 251151315211. The next prime is 251151315257. The reversal of 251151315241 is 142513151152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 251151315241 - 2⁷ = 251151315113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251151315211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20968735 + ... + 20980708.

It is an arithmetic number, because the mean of its divisors is an integer number (62798317668).

Almost surely, 2^251151315241 is an apocalyptic number.

It is an amenable number.

251151315241 is a deficient number, since it is larger than the sum of its proper divisors (41955431).

251151315241 is an equidigital number, since it uses as much as digits as its factorization.

251151315241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41955430.

The product of its digits is 6000, while the sum is 31.

Adding to 251151315241 its reverse (142513151152), we get a palindrome (393664466393).

The spelling of 251151315241 in words is "two hundred fifty-one billion, one hundred fifty-one million, three hundred fifteen thousand, two hundred forty-one".