251423304313 has 4 divisors (see below), whose sum is σ = 252135551988. Its totient is φ = 250711056640.

The previous prime is 251423304263. The next prime is 251423304383. The reversal of 251423304313 is 313403324152.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 78872790649 + 172550513664 = 280843^2 + 415392^2 .

It is a cyclic number.

It is not a de Polignac number, because 251423304313 - 2¹⁷ = 251423173241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251423304383) 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, 356123308 + ... + 356124013.

It is an arithmetic number, because the mean of its divisors is an integer number (63033887997).

Almost surely, 2^251423304313 is an apocalyptic number.

It is an amenable number.

251423304313 is a deficient number, since it is larger than the sum of its proper divisors (712247675).

251423304313 is an equidigital number, since it uses as much as digits as its factorization.

251423304313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712247674.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 251423304313 its reverse (313403324152), we get a palindrome (564826628465).

The spelling of 251423304313 in words is "two hundred fifty-one billion, four hundred twenty-three million, three hundred four thousand, three hundred thirteen".