231212203 has 4 divisors (see below), whose sum is σ = 231598800. Its totient is φ = 230825608.

The previous prime is 231212171. The next prime is 231212213. The reversal of 231212203 is 302212132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231212203 - 2⁵ = 231212171 is a prime.

It is a super-2 number, since 2×231212203² = 106918165632226418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231212213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192400 + ... + 193597.

It is an arithmetic number, because the mean of its divisors is an integer number (57899700).

Almost surely, 2^231212203 is an apocalyptic number.

231212203 is a deficient number, since it is larger than the sum of its proper divisors (386597).

231212203 is an equidigital number, since it uses as much as digits as its factorization.

231212203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386596.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231212203 is about 15205.6635172557. The cubic root of 231212203 is about 613.7670700949.

Adding to 231212203 its reverse (302212132), we get a palindrome (533424335).

The spelling of 231212203 in words is "two hundred thirty-one million, two hundred twelve thousand, two hundred three".