25224478 has 4 divisors (see below), whose sum is σ = 37836720. Its totient is φ = 12612238.

The previous prime is 25224439. The next prime is 25224487. The reversal of 25224478 is 87442252.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6306118 + ... + 6306121.

It is an arithmetic number, because the mean of its divisors is an integer number (9459180).

Almost surely, 2^25224478 is an apocalyptic number.

25224478 is a deficient number, since it is larger than the sum of its proper divisors (12612242).

25224478 is a wasteful number, since it uses less digits than its factorization.

25224478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12612241.

The product of its digits is 35840, while the sum is 34.

The square root of 25224478 is about 5022.3976345964. The cubic root of 25224478 is about 293.2743375960.

The spelling of 25224478 in words is "twenty-five million, two hundred twenty-four thousand, four hundred seventy-eight".