2151399791 has 2 divisors, whose sum is σ = 2151399792. Its totient is φ = 2151399790.

The previous prime is 2151399781. The next prime is 2151399799. The reversal of 2151399791 is 1979931512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2151399791 - 2²⁶ = 2084290927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151399799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075699895 + 1075699896.

It is an arithmetic number, because the mean of its divisors is an integer number (1075699896).

Almost surely, 2^2151399791 is an apocalyptic number.

2151399791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151399791 is an equidigital number, since it uses as much as digits as its factorization.

2151399791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153090, while the sum is 47.

The square root of 2151399791 is about 46383.1843559711. The cubic root of 2151399791 is about 1290.9429219673.

The spelling of 2151399791 in words is "two billion, one hundred fifty-one million, three hundred ninety-nine thousand, seven hundred ninety-one".