13865835225 has 24 divisors (see below), whose sum is σ = 25008926112. Its totient is φ = 6722828800.

The previous prime is 13865835199. The next prime is 13865835227. The reversal of 13865835225 is 52253856831.

It is not a de Polignac number, because 13865835225 - 2¹⁶ = 13865769689 is a prime.

It is a super-2 number, since 2×13865835225² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13865835227) 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, 8402712 + ... + 8404361.

It is an arithmetic number, because the mean of its divisors is an integer number (1042038588).

Almost surely, 2^13865835225 is an apocalyptic number.

13865835225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13865835225 is a deficient number, since it is larger than the sum of its proper divisors (11143090887).

13865835225 is a wasteful number, since it uses less digits than its factorization.

13865835225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807097 (or 16807092 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The spelling of 13865835225 in words is "thirteen billion, eight hundred sixty-five million, eight hundred thirty-five thousand, two hundred twenty-five".