2157512167 has 2 divisors, whose sum is σ = 2157512168. Its totient is φ = 2157512166.

The previous prime is 2157512141. The next prime is 2157512183. The reversal of 2157512167 is 7612157512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157512167 - 2⁷ = 2157512039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157512117) 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, 1078756083 + 1078756084.

It is an arithmetic number, because the mean of its divisors is an integer number (1078756084).

Almost surely, 2^2157512167 is an apocalyptic number.

2157512167 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157512167 is an equidigital number, since it uses as much as digits as its factorization.

2157512167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 37.

The square root of 2157512167 is about 46449.0276216844. The cubic root of 2157512167 is about 1292.1643387576.

Adding to 2157512167 its reverse (7612157512), we get a palindrome (9769669679).

The spelling of 2157512167 in words is "two billion, one hundred fifty-seven million, five hundred twelve thousand, one hundred sixty-seven".