2251413231917 has 2 divisors, whose sum is σ = 2251413231918. Its totient is φ = 2251413231916.

The previous prime is 2251413231913. The next prime is 2251413231923. The reversal of 2251413231917 is 7191323141522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1233374609476 + 1018038622441 = 1110574^2 + 1008979^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251413231917 - 2² = 2251413231913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251413231913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125706615958 + 1125706615959.

It is an arithmetic number, because the mean of its divisors is an integer number (1125706615959).

Almost surely, 2^{2251413231917} is an apocalyptic number.

It is an amenable number.

2251413231917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251413231917 is an equidigital number, since it uses as much as digits as its factorization.

2251413231917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The spelling of 2251413231917 in words is "two trillion, two hundred fifty-one billion, four hundred thirteen million, two hundred thirty-one thousand, nine hundred seventeen".