16864231 has 2 divisors, whose sum is σ = 16864232. Its totient is φ = 16864230.

The previous prime is 16864223. The next prime is 16864259. The reversal of 16864231 is 13246861.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13246861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16864231 - 2³ = 16864223 is a prime.

It is a super-2 number, since 2×16864231² = 568804574442722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16864193 and 16864202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16864261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432115 + 8432116.

It is an arithmetic number, because the mean of its divisors is an integer number (8432116).

Almost surely, 2^16864231 is an apocalyptic number.

16864231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864231 is an equidigital number, since it uses as much as digits as its factorization.

16864231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 16864231 is about 4106.6082111641. The cubic root of 16864231 is about 256.4418182250.

The spelling of 16864231 in words is "sixteen million, eight hundred sixty-four thousand, two hundred thirty-one".