210206231 has 12 divisors (see below), whose sum is σ = 219867912. Its totient is φ = 200858448.

The previous prime is 210206219. The next prime is 210206233. The reversal of 210206231 is 132602012.

It is not a de Polignac number, because 210206231 - 2¹⁸ = 209944087 is a prime.

It is a super-2 number, since 2×210206231² = 88373319102450722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210206233) 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, 93881 + ... + 96093.

It is an arithmetic number, because the mean of its divisors is an integer number (18322326).

Almost surely, 2^210206231 is an apocalyptic number.

210206231 is a deficient number, since it is larger than the sum of its proper divisors (9661681).

210206231 is an equidigital number, since it uses as much as digits as its factorization.

210206231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 210206231 is about 14498.4906455810. The cubic root of 210206231 is about 594.5867063737.

Adding to 210206231 its reverse (132602012), we get a palindrome (342808243).

The spelling of 210206231 in words is "two hundred ten million, two hundred six thousand, two hundred thirty-one".