16122157 has 2 divisors, whose sum is σ = 16122158. Its totient is φ = 16122156.

The previous prime is 16122151. The next prime is 16122181. The reversal of 16122157 is 75122161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12257001 + 3865156 = 3501^2 + 1966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16122157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16122151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8061078 + 8061079.

It is an arithmetic number, because the mean of its divisors is an integer number (8061079).

Almost surely, 2^16122157 is an apocalyptic number.

It is an amenable number.

16122157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16122157 is an equidigital number, since it uses as much as digits as its factorization.

16122157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 16122157 is about 4015.2405905500. The cubic root of 16122157 is about 252.6238689038.

The spelling of 16122157 in words is "sixteen million, one hundred twenty-two thousand, one hundred fifty-seven".