165532651 has 2 divisors, whose sum is σ = 165532652. Its totient is φ = 165532650.

The previous prime is 165532603. The next prime is 165532663. The reversal of 165532651 is 156235561.

It is a strong prime.

It is an emirp because it is prime and its reverse (156235561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165532651 - 2²¹ = 163435499 is a prime.

It is not a weakly prime, because it can be changed into another prime (165532051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82766325 + 82766326.

It is an arithmetic number, because the mean of its divisors is an integer number (82766326).

Almost surely, 2^165532651 is an apocalyptic number.

165532651 is a deficient number, since it is larger than the sum of its proper divisors (1).

165532651 is an equidigital number, since it uses as much as digits as its factorization.

165532651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 165532651 is about 12865.9492848371. The cubic root of 165532651 is about 549.0702208225.

The spelling of 165532651 in words is "one hundred sixty-five million, five hundred thirty-two thousand, six hundred fifty-one".