2151249187 has 2 divisors, whose sum is σ = 2151249188. Its totient is φ = 2151249186.

The previous prime is 2151249167. The next prime is 2151249223. The reversal of 2151249187 is 7819421512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2151249187 - 2²³ = 2142860579 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151249167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075624593 + 1075624594.

It is an arithmetic number, because the mean of its divisors is an integer number (1075624594).

Almost surely, 2^2151249187 is an apocalyptic number.

2151249187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151249187 is an equidigital number, since it uses as much as digits as its factorization.

2151249187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 2151249187 is about 46381.5608512693. The cubic root of 2151249187 is about 1290.9127980599.

The spelling of 2151249187 in words is "two billion, one hundred fifty-one million, two hundred forty-nine thousand, one hundred eighty-seven".