16216965 has 24 divisors (see below), whose sum is σ = 28232568. Its totient is φ = 8611200.

The previous prime is 16216961. The next prime is 16216973. The reversal of 16216965 is 56961261.

It can be written as a sum of positive squares in 4 ways, for example, as 842724 + 15374241 = 918^2 + 3921^2 .

It is not a de Polignac number, because 16216965 - 2² = 16216961 is a prime.

It is a super-2 number, since 2×16216965² = 525979907622450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16216961) 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, 11815 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (1176357).

Almost surely, 2^16216965 is an apocalyptic number.

16216965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16216965 is a deficient number, since it is larger than the sum of its proper divisors (12015603).

16216965 is a wasteful number, since it uses less digits than its factorization.

16216965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1586 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 16216965 is about 4027.0293021035. The cubic root of 16216965 is about 253.1180949191.

The spelling of 16216965 in words is "sixteen million, two hundred sixteen thousand, nine hundred sixty-five".