16556025 has 12 divisors (see below), whose sum is σ = 27372752. Its totient is φ = 8829840.

The previous prime is 16556017. The next prime is 16556041. The reversal of 16556025 is 52065561.

It is not a de Polignac number, because 16556025 - 2³ = 16556017 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16555983 and 16556001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110299 + ... + 110448.

Almost surely, 2^16556025 is an apocalyptic number.

16556025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16556025 is a deficient number, since it is larger than the sum of its proper divisors (10816727).

16556025 is a wasteful number, since it uses less digits than its factorization.

16556025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220760 (or 220755 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 16556025 is about 4068.9095590834. The cubic root of 16556025 is about 254.8699837009.

The spelling of 16556025 in words is "sixteen million, five hundred fifty-six thousand, twenty-five".