210404231 has 2 divisors, whose sum is σ = 210404232. Its totient is φ = 210404230.

The previous prime is 210404219. The next prime is 210404239. The reversal of 210404231 is 132404012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210404231 is a prime.

It is a super-2 number, since 2×210404231² = 88539880845402722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210404239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105202115 + 105202116.

It is an arithmetic number, because the mean of its divisors is an integer number (105202116).

Almost surely, 2^210404231 is an apocalyptic number.

210404231 is a deficient number, since it is larger than the sum of its proper divisors (1).

210404231 is an equidigital number, since it uses as much as digits as its factorization.

210404231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 210404231 is about 14505.3173353774. The cubic root of 210404231 is about 594.7733345605.

Adding to 210404231 its reverse (132404012), we get a palindrome (342808243).

The spelling of 210404231 in words is "two hundred ten million, four hundred four thousand, two hundred thirty-one".