165138053 has 2 divisors, whose sum is σ = 165138054. Its totient is φ = 165138052.

The previous prime is 165138011. The next prime is 165138059. The reversal of 165138053 is 350831561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133587364 + 31550689 = 11558^2 + 5617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165138053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165138059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82569026 + 82569027.

It is an arithmetic number, because the mean of its divisors is an integer number (82569027).

Almost surely, 2^165138053 is an apocalyptic number.

It is an amenable number.

165138053 is a deficient number, since it is larger than the sum of its proper divisors (1).

165138053 is an equidigital number, since it uses as much as digits as its factorization.

165138053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 165138053 is about 12850.6051608475. The cubic root of 165138053 is about 548.6335810856.

The spelling of 165138053 in words is "one hundred sixty-five million, one hundred thirty-eight thousand, fifty-three".