165214945 has 8 divisors (see below), whose sum is σ = 226580544. Its totient is φ = 113290224.

The previous prime is 165214919. The next prime is 165214949. The reversal of 165214945 is 549412561.

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 165214945 - 2⁹ = 165214433 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165214949) 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, 2360179 + ... + 2360248.

It is an arithmetic number, because the mean of its divisors is an integer number (28322568).

Almost surely, 2^165214945 is an apocalyptic number.

It is an amenable number.

165214945 is a deficient number, since it is larger than the sum of its proper divisors (61365599).

165214945 is an equidigital number, since it uses as much as digits as its factorization.

165214945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720439.

The product of its digits is 43200, while the sum is 37.

The square root of 165214945 is about 12853.5965783900. The cubic root of 165214945 is about 548.7187199270.

The spelling of 165214945 in words is "one hundred sixty-five million, two hundred fourteen thousand, nine hundred forty-five".