13818525 has 24 divisors (see below), whose sum is σ = 26111424. Its totient is φ = 6316800.

The previous prime is 13818521. The next prime is 13818533. The reversal of 13818525 is 52581831.

It is a happy number.

It is not a de Polignac number, because 13818525 - 2² = 13818521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13818521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12636 + ... + 13685.

It is an arithmetic number, because the mean of its divisors is an integer number (1087976).

Almost surely, 2^13818525 is an apocalyptic number.

13818525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13818525 is a deficient number, since it is larger than the sum of its proper divisors (12292899).

13818525 is a wasteful number, since it uses less digits than its factorization.

13818525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26341 (or 26336 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 13818525 is about 3717.3276691731. The cubic root of 13818525 is about 239.9683117885.

The spelling of 13818525 in words is "thirteen million, eight hundred eighteen thousand, five hundred twenty-five".