2151166571 has 2 divisors, whose sum is σ = 2151166572. Its totient is φ = 2151166570.

The previous prime is 2151166541. The next prime is 2151166637. The reversal of 2151166571 is 1756611512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151166571 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151166541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075583285 + 1075583286.

It is an arithmetic number, because the mean of its divisors is an integer number (1075583286).

Almost surely, 2^2151166571 is an apocalyptic number.

2151166571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151166571 is an equidigital number, since it uses as much as digits as its factorization.

2151166571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 35.

The square root of 2151166571 is about 46380.6702301724. The cubic root of 2151166571 is about 1290.8962725581.

The spelling of 2151166571 in words is "two billion, one hundred fifty-one million, one hundred sixty-six thousand, five hundred seventy-one".