16156225 has 12 divisors (see below), whose sum is σ = 20089984. Its totient is φ = 12888720.

The previous prime is 16156193. The next prime is 16156243. The reversal of 16156225 is 52265161.

It is not a de Polignac number, because 16156225 - 2⁵ = 16156193 is a prime.

It is a super-2 number, since 2×16156225² = 522047212501250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16156193 and 16156202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11512 + ... + 12838.

Almost surely, 2^16156225 is an apocalyptic number.

It is an amenable number.

16156225 is a deficient number, since it is larger than the sum of its proper divisors (3933759).

16156225 is a wasteful number, since it uses less digits than its factorization.

16156225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824 (or 1819 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 16156225 is about 4019.4806878501. The cubic root of 16156225 is about 252.8016849568.

The spelling of 16156225 in words is "sixteen million, one hundred fifty-six thousand, two hundred twenty-five".