165861324 has 48 divisors (see below), whose sum is σ = 444847200. Its totient is φ = 53379648.

The previous prime is 165861313. The next prime is 165861337. The reversal of 165861324 is 423168561.

It is a happy number.

165861324 is a `hidden beast` number, since 16 + 5 + 8 + 613 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23347 + ... + 29610.

It is an arithmetic number, because the mean of its divisors is an integer number (9267650).

Almost surely, 2^165861324 is an apocalyptic number.

It is an amenable number.

165861324 is an abundant number, since it is smaller than the sum of its proper divisors (278985876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165861324 is a wasteful number, since it uses less digits than its factorization.

165861324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52999 (or 52991 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 165861324 is about 12878.7159297812. The cubic root of 165861324 is about 549.4333823032.

The spelling of 165861324 in words is "one hundred sixty-five million, eight hundred sixty-one thousand, three hundred twenty-four".