72052165 has 4 divisors (see below), whose sum is σ = 86462604. Its totient is φ = 57641728.

The previous prime is 72052151. The next prime is 72052207. The reversal of 72052165 is 56125027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47983329 + 24068836 = 6927^2 + 4906^2 .

It is a cyclic number.

It is not a de Polignac number, because 72052165 - 2²¹ = 69955013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7205212 + ... + 7205221.

It is an arithmetic number, because the mean of its divisors is an integer number (21615651).

Almost surely, 2^72052165 is an apocalyptic number.

It is an amenable number.

72052165 is a deficient number, since it is larger than the sum of its proper divisors (14410439).

72052165 is a wasteful number, since it uses less digits than its factorization.

72052165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14410438.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 72052165 is about 8488.3546697814. The cubic root of 72052165 is about 416.1172103308.

The spelling of 72052165 in words is "seventy-two million, fifty-two thousand, one hundred sixty-five".