2145312135391 has 2 divisors, whose sum is σ = 2145312135392. Its totient is φ = 2145312135390.

The previous prime is 2145312135371. The next prime is 2145312135413. The reversal of 2145312135391 is 1935312135412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145312135391 - 2⁵ = 2145312135359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145312135371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072656067695 + 1072656067696.

It is an arithmetic number, because the mean of its divisors is an integer number (1072656067696).

Almost surely, 2^{2145312135391} is an apocalyptic number.

2145312135391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145312135391 is an equidigital number, since it uses as much as digits as its factorization.

2145312135391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The spelling of 2145312135391 in words is "two trillion, one hundred forty-five billion, three hundred twelve million, one hundred thirty-five thousand, three hundred ninety-one".