13818025 has 48 divisors (see below), whose sum is σ = 20342448. Its totient is φ = 9216000.

The previous prime is 13818023. The next prime is 13818043. The reversal of 13818025 is 52081831.

13818025 = 2628² + 2629².

13818025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 24 ways, for example, as 13816089 + 1936 = 3717^2 + 44^2 .

It is not a de Polignac number, because 13818025 - 2¹ = 13818023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13817984 and 13818002.

It is not an unprimeable number, because it can be changed into a prime (13818023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226495 + ... + 226555.

It is an arithmetic number, because the mean of its divisors is an integer number (423801).

Almost surely, 2^13818025 is an apocalyptic number.

13818025 is the 2629-th centered square number.

It is an amenable number.

13818025 is a deficient number, since it is larger than the sum of its proper divisors (6524423).

13818025 is a wasteful number, since it uses less digits than its factorization.

13818025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 13818025 is about 3717.2604159515. The cubic root of 13818025 is about 239.9654174708.

Adding to 13818025 its reverse (52081831), we get a palindrome (65899856).

The spelling of 13818025 in words is "thirteen million, eight hundred eighteen thousand, twenty-five".