165624245 has 4 divisors (see below), whose sum is σ = 198749100. Its totient is φ = 132499392.

The previous prime is 165624223. The next prime is 165624253. The reversal of 165624245 is 542426561.

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 70190884 + 95433361 = 8378^2 + 9769^2 .

It is a cyclic number.

It is not a de Polignac number, because 165624245 - 2¹⁰ = 165623221 is a prime.

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, 16562420 + ... + 16562429.

It is an arithmetic number, because the mean of its divisors is an integer number (49687275).

Almost surely, 2^165624245 is an apocalyptic number.

It is an amenable number.

165624245 is a deficient number, since it is larger than the sum of its proper divisors (33124855).

165624245 is an equidigital number, since it uses as much as digits as its factorization.

165624245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33124854.

The product of its digits is 57600, while the sum is 35.

The square root of 165624245 is about 12869.5083433673. The cubic root of 165624245 is about 549.1714742901.

The spelling of 165624245 in words is "one hundred sixty-five million, six hundred twenty-four thousand, two hundred forty-five".