16813225 has 24 divisors (see below), whose sum is σ = 24498432. Its totient is φ = 11284800.

The previous prime is 16813211. The next prime is 16813249. The reversal of 16813225 is 52231861.

It is not a de Polignac number, because 16813225 - 2²¹ = 14716073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16813193 and 16813202.

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, 1224 + ... + 5926.

It is an arithmetic number, because the mean of its divisors is an integer number (1020768).

Almost surely, 2^16813225 is an apocalyptic number.

It is an amenable number.

16813225 is a deficient number, since it is larger than the sum of its proper divisors (7685207).

16813225 is a wasteful number, since it uses less digits than its factorization.

16813225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737 (or 4732 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 16813225 is about 4100.3932738214. The cubic root of 16813225 is about 256.1830203684.

The spelling of 16813225 in words is "sixteen million, eight hundred thirteen thousand, two hundred twenty-five".