213203231 has 8 divisors (see below), whose sum is σ = 214280784. Its totient is φ = 212129280.

The previous prime is 213203219. The next prime is 213203257. The reversal of 213203231 is 132302312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213203231 - 2¹⁸ = 212941087 is a prime.

It is a super-2 number, since 2×213203231² = 90911235417678722, 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 (213203531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311816 + ... + 312498.

It is an arithmetic number, because the mean of its divisors is an integer number (26785098).

Almost surely, 2^213203231 is an apocalyptic number.

213203231 is a deficient number, since it is larger than the sum of its proper divisors (1077553).

213203231 is an equidigital number, since it uses as much as digits as its factorization.

213203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 213203231 is about 14601.4804386405. The cubic root of 213203231 is about 597.3991412539.

Adding to 213203231 its reverse (132302312), we get a palindrome (345505543).

The spelling of 213203231 in words is "two hundred thirteen million, two hundred three thousand, two hundred thirty-one".