165562001 has 6 divisors (see below), whose sum is σ = 181981506. Its totient is φ = 150510800.

The previous prime is 165561961. The next prime is 165562003. The reversal of 165562001 is 100265561.

165562001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 103530625 + 62031376 = 10175^2 + 7876^2 .

It is a de Polignac number, because none of the positive numbers 2^k-165562001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165562003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 684020 + ... + 684261.

It is an arithmetic number, because the mean of its divisors is an integer number (30330251).

Almost surely, 2^165562001 is an apocalyptic number.

165562001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165562001 is a deficient number, since it is larger than the sum of its proper divisors (16419505).

165562001 is a wasteful number, since it uses less digits than its factorization.

165562001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368303 (or 1368292 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 165562001 is about 12867.0898419184. The cubic root of 165562001 is about 549.1026701279.

The spelling of 165562001 in words is "one hundred sixty-five million, five hundred sixty-two thousand, one".