25017565 has 4 divisors (see below), whose sum is σ = 30021084. Its totient is φ = 20014048.

The previous prime is 25017533. The next prime is 25017569. The reversal of 25017565 is 56571052.

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 6260004 + 18757561 = 2502^2 + 4331^2 .

It is a cyclic number.

It is not a de Polignac number, because 25017565 - 2⁵ = 25017533 is a prime.

It is a super-3 number, since 3×25017565³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25017569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2501752 + ... + 2501761.

It is an arithmetic number, because the mean of its divisors is an integer number (7505271).

Almost surely, 2^25017565 is an apocalyptic number.

It is an amenable number.

25017565 is a deficient number, since it is larger than the sum of its proper divisors (5003519).

25017565 is an equidigital number, since it uses as much as digits as its factorization.

25017565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003518.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 25017565 is about 5001.7561915791. The cubic root of 25017565 is about 292.4702382848.

The spelling of 25017565 in words is "twenty-five million, seventeen thousand, five hundred sixty-five".