2151402991 has 2 divisors, whose sum is σ = 2151402992. Its totient is φ = 2151402990.

The previous prime is 2151402973. The next prime is 2151403039. The reversal of 2151402991 is 1992041512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2151402991 - 2¹⁹ = 2150878703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151402901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075701495 + 1075701496.

It is an arithmetic number, because the mean of its divisors is an integer number (1075701496).

Almost surely, 2^2151402991 is an apocalyptic number.

2151402991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151402991 is an equidigital number, since it uses as much as digits as its factorization.

2151402991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 2151402991 is about 46383.2188512182. The cubic root of 2151402991 is about 1290.9435620181.

The spelling of 2151402991 in words is "two billion, one hundred fifty-one million, four hundred two thousand, nine hundred ninety-one".