165014821 has 8 divisors (see below), whose sum is σ = 170022104. Its totient is φ = 160081920.

The previous prime is 165014803. The next prime is 165014831. The reversal of 165014821 is 128410561.

It can be written as a sum of positive squares in 4 ways, for example, as 24117921 + 140896900 = 4911^2 + 11870^2 .

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 165014821 - 2¹¹ = 165012773 is a prime.

It is a super-2 number, since 2×165014821² = 54459782299324082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165014821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165014831) 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, 14076 + ... + 22981.

It is an arithmetic number, because the mean of its divisors is an integer number (21252763).

Almost surely, 2^165014821 is an apocalyptic number.

It is an amenable number.

165014821 is a deficient number, since it is larger than the sum of its proper divisors (5007283).

165014821 is an equidigital number, since it uses as much as digits as its factorization.

165014821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37191.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 165014821 is about 12845.8094723532. The cubic root of 165014821 is about 548.4970770380.

It can be divided in two parts, 1650 and 14821, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 165014821 in words is "one hundred sixty-five million, fourteen thousand, eight hundred twenty-one".