168203231 has 12 divisors (see below), whose sum is σ = 196210872. Its totient is φ = 143772048.

The previous prime is 168203213. The next prime is 168203249. The reversal of 168203231 is 132302861.

It is an interprime number because it is at equal distance from previous prime (168203213) and next prime (168203249).

It is not a de Polignac number, because 168203231 - 2¹⁰ = 168202207 is a prime.

It is a super-2 number, since 2×168203231² = 56584653837678722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168203231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168203261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13676 + ... + 22878.

It is an arithmetic number, because the mean of its divisors is an integer number (16350906).

Almost surely, 2^168203231 is an apocalyptic number.

168203231 is a deficient number, since it is larger than the sum of its proper divisors (28007641).

168203231 is an equidigital number, since it uses as much as digits as its factorization.

168203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9590 (or 9583 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 168203231 is about 12969.3188333081. The cubic root of 168203231 is about 552.0072451878.

The spelling of 168203231 in words is "one hundred sixty-eight million, two hundred three thousand, two hundred thirty-one".