52220725 has 6 divisors (see below), whose sum is σ = 64753730. Its totient is φ = 41776560.

The previous prime is 52220717. The next prime is 52220731. The reversal of 52220725 is 52702225.

It can be written as a sum of positive squares in 3 ways, for example, as 178929 + 52041796 = 423^2 + 7214^2 .

It is not a de Polignac number, because 52220725 - 2³ = 52220717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2088829 = 52220725 / (5 + 2 + 2 + 2 + 0 + 7 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 52220725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1044390 + ... + 1044439.

Almost surely, 2^52220725 is an apocalyptic number.

It is an amenable number.

52220725 is a deficient number, since it is larger than the sum of its proper divisors (12533005).

52220725 is a wasteful number, since it uses less digits than its factorization.

52220725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088839 (or 2088834 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 52220725 is about 7226.3908695835. The cubic root of 52220725 is about 373.7784846469.

The spelling of 52220725 in words is "fifty-two million, two hundred twenty thousand, seven hundred twenty-five".