16881225 has 24 divisors (see below), whose sum is σ = 28510080. Its totient is φ = 8809920.

The previous prime is 16881223. The next prime is 16881239. The reversal of 16881225 is 52218861.

It is not a de Polignac number, because 16881225 - 2¹ = 16881223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16881223) 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, 1131 + ... + 5919.

It is an arithmetic number, because the mean of its divisors is an integer number (1187920).

Almost surely, 2^16881225 is an apocalyptic number.

16881225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16881225 is a deficient number, since it is larger than the sum of its proper divisors (11628855).

16881225 is a wasteful number, since it uses less digits than its factorization.

16881225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4849 (or 4844 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 16881225 is about 4108.6767942976. The cubic root of 16881225 is about 256.5279276805.

The spelling of 16881225 in words is "sixteen million, eight hundred eighty-one thousand, two hundred twenty-five".