25415563 has 4 divisors (see below), whose sum is σ = 25567920. Its totient is φ = 25263208.

The previous prime is 25415549. The next prime is 25415569. The reversal of 25415563 is 36551452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25415563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25415569) 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, 75928 + ... + 76261.

It is an arithmetic number, because the mean of its divisors is an integer number (6391980).

Almost surely, 2^25415563 is an apocalyptic number.

25415563 is a deficient number, since it is larger than the sum of its proper divisors (152357).

25415563 is a wasteful number, since it uses less digits than its factorization.

25415563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152356.

The product of its digits is 18000, while the sum is 31.

The square root of 25415563 is about 5041.3850279462. The cubic root of 25415563 is about 294.0130302584.

The spelling of 25415563 in words is "twenty-five million, four hundred fifteen thousand, five hundred sixty-three".