231131433 has 8 divisors (see below), whose sum is σ = 331881088. Its totient is φ = 142234704.

The previous prime is 231131429. The next prime is 231131471. The reversal of 231131433 is 334131132.

231131433 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 not a de Polignac number, because 231131433 - 2² = 231131429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231131413) 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, 2963185 + ... + 2963262.

It is an arithmetic number, because the mean of its divisors is an integer number (41485136).

Almost surely, 2^231131433 is an apocalyptic number.

It is an amenable number.

231131433 is a deficient number, since it is larger than the sum of its proper divisors (100749655).

231131433 is a wasteful number, since it uses less digits than its factorization.

231131433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926463.

The product of its digits is 648, while the sum is 21.

The square root of 231131433 is about 15203.0073669653. The cubic root of 231131433 is about 613.6955921202.

Adding to 231131433 its reverse (334131132), we get a palindrome (565262565).

The spelling of 231131433 in words is "two hundred thirty-one million, one hundred thirty-one thousand, four hundred thirty-three".