16162921 has 2 divisors, whose sum is σ = 16162922. Its totient is φ = 16162920.

The previous prime is 16162919. The next prime is 16162943. The reversal of 16162921 is 12926161.

16162921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13957696 + 2205225 = 3736^2 + 1485^2 .

It is a cyclic number.

It is not a de Polignac number, because 16162921 - 2¹ = 16162919 is a prime.

It is a super-2 number, since 2×16162921² = 522480030504482, which contains 22 as substring.

Together with 16162919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16162921.

It is not a weakly prime, because it can be changed into another prime (16162961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8081460 + 8081461.

It is an arithmetic number, because the mean of its divisors is an integer number (8081461).

Almost surely, 2^16162921 is an apocalyptic number.

It is an amenable number.

16162921 is a deficient number, since it is larger than the sum of its proper divisors (1).

16162921 is an equidigital number, since it uses as much as digits as its factorization.

16162921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 16162921 is about 4020.3135449863. The cubic root of 16162921 is about 252.8366049599.

The spelling of 16162921 in words is "sixteen million, one hundred sixty-two thousand, nine hundred twenty-one".