25224340 has 12 divisors (see below), whose sum is σ = 52971156. Its totient is φ = 10089728.

The previous prime is 25224323. The next prime is 25224349. The reversal of 25224340 is 4342252.

It can be written as a sum of positive squares in 2 ways, for example, as 16941456 + 8282884 = 4116^2 + 2878^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25224349) 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, 630589 + ... + 630628.

It is an arithmetic number, because the mean of its divisors is an integer number (4414263).

Almost surely, 2^25224340 is an apocalyptic number.

25224340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25224340 is an abundant number, since it is smaller than the sum of its proper divisors (27746816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25224340 is a wasteful number, since it uses less digits than its factorization.

25224340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261226 (or 1261224 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 25224340 is about 5022.3838961195. The cubic root of 25224340 is about 293.2738027725.

Adding to 25224340 its reverse (4342252), we get a palindrome (29566592).

The spelling of 25224340 in words is "twenty-five million, two hundred twenty-four thousand, three hundred forty".