25228479 has 4 divisors (see below), whose sum is σ = 33637976. Its totient is φ = 16818984.

The previous prime is 25228457. The next prime is 25228481. The reversal of 25228479 is 97482252.

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

It is not a de Polignac number, because 25228479 - 2⁹ = 25227967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25228429) 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, 4204744 + ... + 4204749.

It is an arithmetic number, because the mean of its divisors is an integer number (8409494).

Almost surely, 2^25228479 is an apocalyptic number.

25228479 is a deficient number, since it is larger than the sum of its proper divisors (8409497).

25228479 is an equidigital number, since it uses as much as digits as its factorization.

25228479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409496.

The product of its digits is 80640, while the sum is 39.

The square root of 25228479 is about 5022.7959345369. The cubic root of 25228479 is about 293.2898427545.

The spelling of 25228479 in words is "twenty-five million, two hundred twenty-eight thousand, four hundred seventy-nine".