231408433 has 4 divisors (see below), whose sum is σ = 232746228. Its totient is φ = 230070640.

The previous prime is 231408421. The next prime is 231408449. The reversal of 231408433 is 334804132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 169833024 + 61575409 = 13032^2 + 7847^2 .

It is a cyclic number.

It is not a de Polignac number, because 231408433 - 2¹³ = 231400241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231406433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668638 + ... + 668983.

It is an arithmetic number, because the mean of its divisors is an integer number (58186557).

Almost surely, 2^231408433 is an apocalyptic number.

It is an amenable number.

231408433 is a deficient number, since it is larger than the sum of its proper divisors (1337795).

231408433 is a wasteful number, since it uses less digits than its factorization.

231408433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337794.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 231408433 is about 15212.1146787684. The cubic root of 231408433 is about 613.9406558807.

The spelling of 231408433 in words is "two hundred thirty-one million, four hundred eight thousand, four hundred thirty-three".