251315142413 has 2 divisors, whose sum is σ = 251315142414. Its totient is φ = 251315142412.

The previous prime is 251315142319. The next prime is 251315142427. The reversal of 251315142413 is 314241513152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181781144164 + 69533998249 = 426358^2 + 263693^2 .

It is a cyclic number.

It is not a de Polignac number, because 251315142413 - 2¹⁸ = 251314880269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251315142413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251315142433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125657571206 + 125657571207.

It is an arithmetic number, because the mean of its divisors is an integer number (125657571207).

Almost surely, 2^251315142413 is an apocalyptic number.

It is an amenable number.

251315142413 is a deficient number, since it is larger than the sum of its proper divisors (1).

251315142413 is an equidigital number, since it uses as much as digits as its factorization.

251315142413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

Adding to 251315142413 its reverse (314241513152), we get a palindrome (565556655565).

The spelling of 251315142413 in words is "two hundred fifty-one billion, three hundred fifteen million, one hundred forty-two thousand, four hundred thirteen".