251450390413 has 2 divisors, whose sum is σ = 251450390414. Its totient is φ = 251450390412.

The previous prime is 251450390383. The next prime is 251450390423. The reversal of 251450390413 is 314093054152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166409332489 + 85041057924 = 407933^2 + 291618^2 .

It is a cyclic number.

It is not a de Polignac number, because 251450390413 - 2⁵ = 251450390381 is a prime.

It is a super-3 number, since 3×251450390413³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251450390423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125725195206 + 125725195207.

It is an arithmetic number, because the mean of its divisors is an integer number (125725195207).

Almost surely, 2^251450390413 is an apocalyptic number.

It is an amenable number.

251450390413 is a deficient number, since it is larger than the sum of its proper divisors (1).

251450390413 is an equidigital number, since it uses as much as digits as its factorization.

251450390413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 251450390413 in words is "two hundred fifty-one billion, four hundred fifty million, three hundred ninety thousand, four hundred thirteen".