15801801225 has 24 divisors (see below), whose sum is σ = 29857880640. Its totient is φ = 7223680320.

The previous prime is 15801801203. The next prime is 15801801241. The reversal of 15801801225 is 52210810851.

It is not a de Polignac number, because 15801801225 - 2⁶ = 15801801161 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15048810 + ... + 15049859.

It is an arithmetic number, because the mean of its divisors is an integer number (1244078360).

Almost surely, 2^15801801225 is an apocalyptic number.

15801801225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15801801225 is a deficient number, since it is larger than the sum of its proper divisors (14056079415).

15801801225 is a wasteful number, since it uses less digits than its factorization.

15801801225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30098689 (or 30098684 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 33.

The spelling of 15801801225 in words is "fifteen billion, eight hundred one million, eight hundred one thousand, two hundred twenty-five".