233431421 has 4 divisors (see below), whose sum is σ = 233480700. Its totient is φ = 233382144.

The previous prime is 233431399. The next prime is 233431427. The reversal of 233431421 is 124134332.

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 55502500 + 177928921 = 7450^2 + 13339^2 .

It is a cyclic number.

It is not a de Polignac number, because 233431421 - 2⁶ = 233431357 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 (233431427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16676 + ... + 27293.

It is an arithmetic number, because the mean of its divisors is an integer number (58370175).

Almost surely, 2^233431421 is an apocalyptic number.

It is an amenable number.

233431421 is a deficient number, since it is larger than the sum of its proper divisors (49279).

233431421 is an equidigital number, since it uses as much as digits as its factorization.

233431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49278.

The product of its digits is 1728, while the sum is 23.

The square root of 233431421 is about 15278.4626517199. The cubic root of 233431421 is about 615.7245045204.

Adding to 233431421 its reverse (124134332), we get a palindrome (357565753).

The spelling of 233431421 in words is "two hundred thirty-three million, four hundred thirty-one thousand, four hundred twenty-one".