25150561 has 4 divisors (see below), whose sum is σ = 25172224. Its totient is φ = 25128900.

The previous prime is 25150529. The next prime is 25150603. The reversal of 25150561 is 16505152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25150561 - 2⁵ = 25150529 is a prime.

It is a super-2 number, since 2×25150561² = 1265101437229442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25151561) 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, 8985 + ... + 11446.

It is an arithmetic number, because the mean of its divisors is an integer number (6293056).

Almost surely, 2^25150561 is an apocalyptic number.

It is an amenable number.

25150561 is a deficient number, since it is larger than the sum of its proper divisors (21663).

25150561 is a wasteful number, since it uses less digits than its factorization.

25150561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21662.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 25150561 is about 5015.0334993896. The cubic root of 25150561 is about 292.9875900889.

The spelling of 25150561 in words is "twenty-five million, one hundred fifty thousand, five hundred sixty-one".