231404433 has 24 divisors (see below), whose sum is σ = 337481280. Its totient is φ = 140961600.

The previous prime is 231404423. The next prime is 231404441. The reversal of 231404433 is 334404132.

It is not a de Polignac number, because 231404433 - 2²⁵ = 197850001 is a prime.

It is a super-2 number, since 2×231404433² = 107096023224102978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231404423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48948 + ... + 53466.

It is an arithmetic number, because the mean of its divisors is an integer number (14061720).

Almost surely, 2^231404433 is an apocalyptic number.

It is an amenable number.

231404433 is a deficient number, since it is larger than the sum of its proper divisors (106076847).

231404433 is a wasteful number, since it uses less digits than its factorization.

231404433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649 (or 4636 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 231404433 is about 15211.9832040402. The cubic root of 231404433 is about 613.9371184458.

Adding to 231404433 its reverse (334404132), we get a palindrome (565808565).

The spelling of 231404433 in words is "two hundred thirty-one million, four hundred four thousand, four hundred thirty-three".