25553345 has 12 divisors (see below), whose sum is σ = 32058516. Its totient is φ = 19551840.

The previous prime is 25553287. The next prime is 25553357. The reversal of 25553345 is 54335552.

It can be written as a sum of positive squares in 2 ways, for example, as 2666689 + 22886656 = 1633^2 + 4784^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25553345 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2186 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (2671543).

Almost surely, 2^25553345 is an apocalyptic number.

It is an amenable number.

25553345 is a deficient number, since it is larger than the sum of its proper divisors (6505171).

25553345 is an equidigital number, since it uses as much as digits as its factorization.

25553345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712 (or 9689 counting only the distinct ones).

The product of its digits is 45000, while the sum is 32.

The square root of 25553345 is about 5055.0316517308. The cubic root of 25553345 is about 294.5433709231.

Adding to 25553345 its reverse (54335552), we get a palindrome (79888897).

The spelling of 25553345 in words is "twenty-five million, five hundred fifty-three thousand, three hundred forty-five".