25553145 has 32 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 13072320.

The previous prime is 25553123. The next prime is 25553153. The reversal of 25553145 is 54135552.

It is a happy number.

It is not a de Polignac number, because 25553145 - 2⁸ = 25552889 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83082 + ... + 83388.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^25553145 is an apocalyptic number.

It is an amenable number.

25553145 is a deficient number, since it is larger than the sum of its proper divisors (17024775).

25553145 is a wasteful number, since it uses less digits than its factorization.

25553145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 15000, while the sum is 30.

The square root of 25553145 is about 5055.0118694223. The cubic root of 25553145 is about 294.5426024807.

Adding to 25553145 its reverse (54135552), we get a palindrome (79688697).

The spelling of 25553145 in words is "twenty-five million, five hundred fifty-three thousand, one hundred forty-five".