52220345 has 16 divisors (see below), whose sum is σ = 66624768. Its totient is φ = 39156480.

The previous prime is 52220323. The next prime is 52220353. The reversal of 52220345 is 54302225.

It is a de Polignac number, because none of the positive numbers 2^k-52220345 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 52220345.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21902 + ... + 24168.

It is an arithmetic number, because the mean of its divisors is an integer number (4164048).

Almost surely, 2^52220345 is an apocalyptic number.

It is an amenable number.

52220345 is a deficient number, since it is larger than the sum of its proper divisors (14404423).

52220345 is a wasteful number, since it uses less digits than its factorization.

52220345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 52220345 is about 7226.3645770193. The cubic root of 52220345 is about 373.7775780070. Note that the first 3 decimals are identical.

The spelling of 52220345 in words is "fifty-two million, two hundred twenty thousand, three hundred forty-five".