16840231 has 2 divisors, whose sum is σ = 16840232. Its totient is φ = 16840230.

The previous prime is 16840171. The next prime is 16840237. The reversal of 16840231 is 13204861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16840231 is a prime.

It is a super-2 number, since 2×16840231² = 567186760266722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16840196 and 16840205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16840237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8420115 + 8420116.

It is an arithmetic number, because the mean of its divisors is an integer number (8420116).

Almost surely, 2^16840231 is an apocalyptic number.

16840231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16840231 is an equidigital number, since it uses as much as digits as its factorization.

16840231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 16840231 is about 4103.6850512679. The cubic root of 16840231 is about 256.3201104213.

It can be divided in two parts, 16840 and 231, that added together give a palindrome (17071).

The spelling of 16840231 in words is "sixteen million, eight hundred forty thousand, two hundred thirty-one".