16211656 has 8 divisors (see below), whose sum is σ = 30396870. Its totient is φ = 8105824.

The previous prime is 16211653. The next prime is 16211683. The reversal of 16211656 is 65611261.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 2149156 = 3750^2 + 1466^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16211651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013221 + ... + 1013236.

Almost surely, 2^16211656 is an apocalyptic number.

16211656 is the 2547-th centered pentagonal number.

It is an amenable number.

16211656 is a deficient number, since it is larger than the sum of its proper divisors (14185214).

16211656 is a wasteful number, since it uses less digits than its factorization.

16211656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026463 (or 2026459 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 16211656 is about 4026.3700773774. The cubic root of 16211656 is about 253.0904705427.

The spelling of 16211656 in words is "sixteen million, two hundred eleven thousand, six hundred fifty-six".