165214861 has 8 divisors (see below), whose sum is σ = 198754880. Its totient is φ = 134159328.

The previous prime is 165214843. The next prime is 165214909. The reversal of 165214861 is 168412561.

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 165214861 - 2⁷ = 165214733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165214801) 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, 620976 + ... + 621241.

It is an arithmetic number, because the mean of its divisors is an integer number (24844360).

Almost surely, 2^165214861 is an apocalyptic number.

It is an amenable number.

165214861 is a deficient number, since it is larger than the sum of its proper divisors (33540019).

165214861 is a wasteful number, since it uses less digits than its factorization.

165214861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242243.

The product of its digits is 11520, while the sum is 34.

The square root of 165214861 is about 12853.5933108217. The cubic root of 165214861 is about 548.7186269322.

The spelling of 165214861 in words is "one hundred sixty-five million, two hundred fourteen thousand, eight hundred sixty-one".