213403231 has 8 divisors (see below), whose sum is σ = 224784000. Its totient is φ = 202037400.

The previous prime is 213403217. The next prime is 213403243. The reversal of 213403231 is 132304312.

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 213403231 - 2⁷ = 213403103 is a prime.

It is a super-2 number, since 2×213403231² = 91081878002478722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213403199 and 213403208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213403271) 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, 37206 + ... + 42556.

It is an arithmetic number, because the mean of its divisors is an integer number (28098000).

Almost surely, 2^213403231 is an apocalyptic number.

213403231 is a deficient number, since it is larger than the sum of its proper divisors (11380769).

213403231 is a wasteful number, since it uses less digits than its factorization.

213403231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7469.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 213403231 is about 14608.3274538874. The cubic root of 213403231 is about 597.5858840266.

Adding to 213403231 its reverse (132304312), we get a palindrome (345707543).

The spelling of 213403231 in words is "two hundred thirteen million, four hundred three thousand, two hundred thirty-one".