233340421 has 2 divisors, whose sum is σ = 233340422. Its totient is φ = 233340420.

The previous prime is 233340391. The next prime is 233340439. The reversal of 233340421 is 124043332.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226653025 + 6687396 = 15055^2 + 2586^2 .

It is a cyclic number.

It is not a de Polignac number, because 233340421 - 2²¹ = 231243269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 233340392 and 233340401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233340461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116670210 + 116670211.

It is an arithmetic number, because the mean of its divisors is an integer number (116670211).

Almost surely, 2^233340421 is an apocalyptic number.

It is an amenable number.

233340421 is a deficient number, since it is larger than the sum of its proper divisors (1).

233340421 is an equidigital number, since it uses as much as digits as its factorization.

233340421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 233340421 is about 15275.4843131077. The cubic root of 233340421 is about 615.6444835700.

Adding to 233340421 its reverse (124043332), we get a palindrome (357383753).

The spelling of 233340421 in words is "two hundred thirty-three million, three hundred forty thousand, four hundred twenty-one".