16355881 has 2 divisors, whose sum is σ = 16355882. Its totient is φ = 16355880.

The previous prime is 16355851. The next prime is 16355893. The reversal of 16355881 is 18855361.

16355881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14707225 + 1648656 = 3835^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 16355881 - 2¹³ = 16347689 is a prime.

It is a super-2 number, since 2×16355881² = 535029686572322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16355881.

It is not a weakly prime, because it can be changed into another prime (16355831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8177940 + 8177941.

It is an arithmetic number, because the mean of its divisors is an integer number (8177941).

Almost surely, 2^16355881 is an apocalyptic number.

It is an amenable number.

16355881 is a deficient number, since it is larger than the sum of its proper divisors (1).

16355881 is an equidigital number, since it uses as much as digits as its factorization.

16355881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The square root of 16355881 is about 4044.2404725733. The cubic root of 16355881 is about 253.8387852091.

The spelling of 16355881 in words is "sixteen million, three hundred fifty-five thousand, eight hundred eighty-one".