52320145 has 4 divisors (see below), whose sum is σ = 62784180. Its totient is φ = 41856112.

The previous prime is 52320139. The next prime is 52320161. The reversal of 52320145 is 54102325.

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 23030401 + 29289744 = 4799^2 + 5412^2 .

It is a cyclic number.

It is not a de Polignac number, because 52320145 - 2³ = 52320137 is a prime.

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, 5232010 + ... + 5232019.

It is an arithmetic number, because the mean of its divisors is an integer number (15696045).

Almost surely, 2^52320145 is an apocalyptic number.

It is an amenable number.

52320145 is a deficient number, since it is larger than the sum of its proper divisors (10464035).

52320145 is a wasteful number, since it uses less digits than its factorization.

52320145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10464034.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 52320145 is about 7233.2665511510. The cubic root of 52320145 is about 374.0155393088.

The spelling of 52320145 in words is "fifty-two million, three hundred twenty thousand, one hundred forty-five".