16947225 has 30 divisors (see below), whose sum is σ = 31395870. Its totient is φ = 9037440.

The previous prime is 16947209. The next prime is 16947233. The reversal of 16947225 is 52274961.

16947225 is a `hidden beast` number, since 169 + 472 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2178576 + 14768649 = 1476^2 + 3843^2 .

It is not a de Polignac number, because 16947225 - 2⁴ = 16947209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16947225.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2160 + ... + 6209.

It is an arithmetic number, because the mean of its divisors is an integer number (1046529).

Almost surely, 2^16947225 is an apocalyptic number.

16947225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16947225 is a deficient number, since it is larger than the sum of its proper divisors (14448645).

16947225 is an equidigital number, since it uses as much as digits as its factorization.

16947225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8391 (or 8377 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 16947225 is about 4116.7007420992. The cubic root of 16947225 is about 256.8618060249.

The spelling of 16947225 in words is "sixteen million, nine hundred forty-seven thousand, two hundred twenty-five".