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231133213 = 4317930029
BaseRepresentation
bin11011100011011…
…01000000011101
3121002220210011101
431301231000131
5433132230323
634533553101
75504412523
oct1561550035
9532823141
10231133213
11109517893
12654a5791
1338b6801c
14229a8313
1515458dad
hexdc6d01d

231133213 has 8 divisors (see below), whose sum is σ = 237837600. Its totient is φ = 224489328.

The previous prime is 231133211. The next prime is 231133237. The reversal of 231133213 is 312331132.

231133213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 231133213 - 21 = 231133211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231133211) 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, 7318 + ... + 22711.

It is an arithmetic number, because the mean of its divisors is an integer number (29729700).

Almost surely, 2231133213 is an apocalyptic number.

It is an amenable number.

231133213 is a deficient number, since it is larger than the sum of its proper divisors (6704387).

231133213 is a wasteful number, since it uses less digits than its factorization.

231133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30251.

The product of its digits is 324, while the sum is 19.

The square root of 231133213 is about 15203.0659079016. The cubic root of 231133213 is about 613.6971675230.

Adding to 231133213 its reverse (312331132), we get a palindrome (543464345).

The spelling of 231133213 in words is "two hundred thirty-one million, one hundred thirty-three thousand, two hundred thirteen".

Divisors: 1 43 179 7697 30029 1291247 5375191 231133213