16216331 has 2 divisors, whose sum is σ = 16216332. Its totient is φ = 16216330.

The previous prime is 16216303. The next prime is 16216339. The reversal of 16216331 is 13361261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16216331 - 2⁶ = 16216267 is a prime.

It is a super-2 number, since 2×16216331² = 525938782203122, which contains 22 as substring.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 16216297 and 16216306.

It is not a weakly prime, because it can be changed into another prime (16216339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108165 + 8108166.

It is an arithmetic number, because the mean of its divisors is an integer number (8108166).

Almost surely, 2^16216331 is an apocalyptic number.

16216331 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216331 is an equidigital number, since it uses as much as digits as its factorization.

16216331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 16216331 is about 4026.9505832578. The cubic root of 16216331 is about 253.1147963372.

Adding to 16216331 its reverse (13361261), we get a palindrome (29577592).

The spelling of 16216331 in words is "sixteen million, two hundred sixteen thousand, three hundred thirty-one".