231133643 has 8 divisors (see below), whose sum is σ = 254702448. Its totient is φ = 208391904.

The previous prime is 231133607. The next prime is 231133657. The reversal of 231133643 is 346331132.

It is a happy number.

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 231133643 - 2⁶ = 231133579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231133543) 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, 206180 + ... + 207297.

It is an arithmetic number, because the mean of its divisors is an integer number (31837806).

Almost surely, 2^231133643 is an apocalyptic number.

231133643 is a deficient number, since it is larger than the sum of its proper divisors (23568805).

231133643 is a wasteful number, since it uses less digits than its factorization.

231133643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413533.

The product of its digits is 3888, while the sum is 26.

The square root of 231133643 is about 15203.0800497794. The cubic root of 231133643 is about 613.6975480967.

Adding to 231133643 its reverse (346331132), we get a palindrome (577464775).

The spelling of 231133643 in words is "two hundred thirty-one million, one hundred thirty-three thousand, six hundred forty-three".