165219157 has 2 divisors, whose sum is σ = 165219158. Its totient is φ = 165219156.

The previous prime is 165219151. The next prime is 165219161. The reversal of 165219157 is 751912561.

165219157 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., 159415876 + 5803281 = 12626^2 + 2409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165219157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165219151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82609578 + 82609579.

It is an arithmetic number, because the mean of its divisors is an integer number (82609579).

Almost surely, 2^165219157 is an apocalyptic number.

It is an amenable number.

165219157 is a deficient number, since it is larger than the sum of its proper divisors (1).

165219157 is an equidigital number, since it uses as much as digits as its factorization.

165219157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 37.

The square root of 165219157 is about 12853.7604225378. The cubic root of 165219157 is about 548.7233829103.

The spelling of 165219157 in words is "one hundred sixty-five million, two hundred nineteen thousand, one hundred fifty-seven".