25553 has 8 divisors (see below), whose sum is σ = 29376. Its totient is φ = 22000.

The previous prime is 25541. The next prime is 25561. The reversal of 25553 is 35552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25553 - 2⁴ = 25537 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (25523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203 + ... + 303.

It is an arithmetic number, because the mean of its divisors is an integer number (3672).

2²⁵⁵⁵³ is an apocalyptic number.

25553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25553 is a deficient number, since it is larger than the sum of its proper divisors (3823).

25553 is a wasteful number, since it uses less digits than its factorization.

25553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135.

The product of its digits is 750, while the sum is 20.

The square root of 25553 is about 159.8530575247. The cubic root of 25553 is about 29.4542045357.

Subtracting 25553 from its reverse (35552), we obtain a palindrome (9999).

It can be divided in two parts, 2 and 5553, that added together give a palindrome (5555).

The spelling of 25553 in words is "twenty-five thousand, five hundred fifty-three".