16216831 has 2 divisors, whose sum is σ = 16216832. Its totient is φ = 16216830.

The previous prime is 16216819. The next prime is 16216873. The reversal of 16216831 is 13861261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16216831 - 2⁷ = 16216703 is a prime.

It is a super-2 number, since 2×16216831² = 525971215365122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16216831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16216801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108415 + 8108416.

It is an arithmetic number, because the mean of its divisors is an integer number (8108416).

Almost surely, 2^16216831 is an apocalyptic number.

16216831 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216831 is an equidigital number, since it uses as much as digits as its factorization.

16216831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 16216831 is about 4027.0126644946. The cubic root of 16216831 is about 253.1173977496.

The spelling of 16216831 in words is "sixteen million, two hundred sixteen thousand, eight hundred thirty-one".