25319563 has 4 divisors (see below), whose sum is σ = 25565488. Its totient is φ = 25073640.

The previous prime is 25319551. The next prime is 25319587. The reversal of 25319563 is 36591352.

It is a happy number.

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-25319563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25319513) 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, 122808 + ... + 123013.

It is an arithmetic number, because the mean of its divisors is an integer number (6391372).

Almost surely, 2^25319563 is an apocalyptic number.

25319563 is a deficient number, since it is larger than the sum of its proper divisors (245925).

25319563 is a wasteful number, since it uses less digits than its factorization.

25319563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245924.

The product of its digits is 24300, while the sum is 34.

The square root of 25319563 is about 5031.8548269997. The cubic root of 25319563 is about 293.6423798914.

The spelling of 25319563 in words is "twenty-five million, three hundred nineteen thousand, five hundred sixty-three".