165000553 has 2 divisors, whose sum is σ = 165000554. Its totient is φ = 165000552.

The previous prime is 165000529. The next prime is 165000593. The reversal of 165000553 is 355000561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161874729 + 3125824 = 12723^2 + 1768^2 .

It is a cyclic number.

It is not a de Polignac number, because 165000553 - 2⁹ = 165000041 is a prime.

It is not a weakly prime, because it can be changed into another prime (165000593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82500276 + 82500277.

It is an arithmetic number, because the mean of its divisors is an integer number (82500277).

Almost surely, 2^165000553 is an apocalyptic number.

It is an amenable number.

165000553 is a deficient number, since it is larger than the sum of its proper divisors (1).

165000553 is an equidigital number, since it uses as much as digits as its factorization.

165000553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 165000553 is about 12845.2541041429. The cubic root of 165000553 is about 548.4812679897.

The spelling of 165000553 in words is "one hundred sixty-five million, five hundred fifty-three", and thus it is an aban number.