25140224 has 22 divisors (see below), whose sum is σ = 50257944. Its totient is φ = 12569600.

The previous prime is 25140223. The next prime is 25140239. The reversal of 25140224 is 42204152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25140196 and 25140205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25140223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252 + ... + 13299.

It is an arithmetic number, because the mean of its divisors is an integer number (2284452).

Almost surely, 2^25140224 is an apocalyptic number.

It is an amenable number.

25140224 is a deficient number, since it is larger than the sum of its proper divisors (25117720).

25140224 is an equidigital number, since it uses as much as digits as its factorization.

25140224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24571 (or 24553 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 25140224 is about 5014.0027921811. The cubic root of 25140224 is about 292.9474448249.

Adding to 25140224 its reverse (42204152), we get a palindrome (67344376).

The spelling of 25140224 in words is "twenty-five million, one hundred forty thousand, two hundred twenty-four".