215616157 has 2 divisors, whose sum is σ = 215616158. Its totient is φ = 215616156.

The previous prime is 215616097. The next prime is 215616169. The reversal of 215616157 is 751616512.

215616157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110061081 + 105555076 = 10491^2 + 10274^2 .

It is a cyclic number.

It is not a de Polignac number, because 215616157 - 2²³ = 207227549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215616257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107808078 + 107808079.

It is an arithmetic number, because the mean of its divisors is an integer number (107808079).

Almost surely, 2^215616157 is an apocalyptic number.

It is an amenable number.

215616157 is a deficient number, since it is larger than the sum of its proper divisors (1).

215616157 is an equidigital number, since it uses as much as digits as its factorization.

215616157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 215616157 is about 14683.8740460411. The cubic root of 215616157 is about 599.6443790794.

The spelling of 215616157 in words is "two hundred fifteen million, six hundred sixteen thousand, one hundred fifty-seven".