25532553 has 32 divisors (see below), whose sum is σ = 37253376. Its totient is φ = 15510528.

The previous prime is 25532537. The next prime is 25532569. The reversal of 25532553 is 35523552.

It is an interprime number because it is at equal distance from previous prime (25532537) and next prime (25532569).

It is not a de Polignac number, because 25532553 - 2⁴ = 25532537 is a prime.

It is a super-2 number, since 2×25532553² = 1303822525395618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25532553.

It is not an unprimeable number, because it can be changed into a prime (25532513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186301 + ... + 186437.

It is an arithmetic number, because the mean of its divisors is an integer number (1164168).

Almost surely, 2^25532553 is an apocalyptic number.

25532553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25532553 is a deficient number, since it is larger than the sum of its proper divisors (11720823).

25532553 is a wasteful number, since it uses less digits than its factorization.

25532553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its digits is 22500, while the sum is 30.

The square root of 25532553 is about 5052.9746684503. The cubic root of 25532553 is about 294.4634621737.

Subtracting 25532553 from its reverse (35523552), we obtain a palindrome (9990999).

The spelling of 25532553 in words is "twenty-five million, five hundred thirty-two thousand, five hundred fifty-three".