25533 has 6 divisors (see below), whose sum is σ = 36894. Its totient is φ = 17016.

The previous prime is 25523. The next prime is 25537. The reversal of 25533 is 33552.

It can be written as a sum of positive squares in only one way, i.e., 15129 + 10404 = 123^2 + 102^2 .

It is not a de Polignac number, because 25533 - 2⁶ = 25469 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1410 + ... + 1427.

It is an arithmetic number, because the mean of its divisors is an integer number (6149).

2²⁵⁵³³ is an apocalyptic number.

It is an amenable number.

25533 is a deficient number, since it is larger than the sum of its proper divisors (11361).

25533 is a wasteful number, since it uses less digits than its factorization.

25533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843 (or 2840 counting only the distinct ones).

The product of its digits is 450, while the sum is 18.

The square root of 25533 is about 159.7904878270. The cubic root of 25533 is about 29.4465180560.

It can be divided in two parts, 2553 and 3, that added together give a triangular number (2556 = T₇₁).

The spelling of 25533 in words is "twenty-five thousand, five hundred thirty-three".