25220566 has 8 divisors (see below), whose sum is σ = 43235280. Its totient is φ = 10808808.

The previous prime is 25220557. The next prime is 25220579. The reversal of 25220566 is 66502252.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 900721 + ... + 900748.

It is an arithmetic number, because the mean of its divisors is an integer number (5404410).

Almost surely, 2^25220566 is an apocalyptic number.

25220566 is a deficient number, since it is larger than the sum of its proper divisors (18014714).

25220566 is a wasteful number, since it uses less digits than its factorization.

25220566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801478.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 25220566 is about 5022.0081640714. The cubic root of 25220566 is about 293.2591757556.

The spelling of 25220566 in words is "twenty-five million, two hundred twenty thousand, five hundred sixty-six".