162165621 has 8 divisors (see below), whose sum is σ = 216365760. Its totient is φ = 108037952.

The previous prime is 162165611. The next prime is 162165623. The reversal of 162165621 is 126561261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 162165621 - 2⁹ = 162165109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162165623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12660 + ... + 22013.

It is an arithmetic number, because the mean of its divisors is an integer number (27045720).

Almost surely, 2^162165621 is an apocalyptic number.

It is an amenable number.

162165621 is a deficient number, since it is larger than the sum of its proper divisors (54200139).

162165621 is a wasteful number, since it uses less digits than its factorization.

162165621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36235.

The product of its digits is 4320, while the sum is 30.

The square root of 162165621 is about 12734.4266066439. The cubic root of 162165621 is about 545.3218882372.

The spelling of 162165621 in words is "one hundred sixty-two million, one hundred sixty-five thousand, six hundred twenty-one".