25224401 has 2 divisors, whose sum is σ = 25224402. Its totient is φ = 25224400.

The previous prime is 25224373. The next prime is 25224427. The reversal of 25224401 is 10442252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 1263376 = 4895^2 + 1124^2 .

It is a cyclic number.

It is not a de Polignac number, because 25224401 - 2¹⁴ = 25208017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25224431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12612200 + 12612201.

It is an arithmetic number, because the mean of its divisors is an integer number (12612201).

Almost surely, 2^25224401 is an apocalyptic number.

It is an amenable number.

25224401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25224401 is an equidigital number, since it uses as much as digits as its factorization.

25224401 is an evil number, because the sum of its binary digits is even.

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

The square root of 25224401 is about 5022.3899689291. The cubic root of 25224401 is about 293.2740391802.

Adding to 25224401 its reverse (10442252), we get a palindrome (35666653).

The spelling of 25224401 in words is "twenty-five million, two hundred twenty-four thousand, four hundred one".