233121313 has 4 divisors (see below), whose sum is σ = 234139540. Its totient is φ = 232103088.

The previous prime is 233121311. The next prime is 233121319. The reversal of 233121313 is 313121332.

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 140730769 + 92390544 = 11863^2 + 9612^2 .

It is a cyclic number.

It is not a de Polignac number, because 233121313 - 2¹ = 233121311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233121311) 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, 508770 + ... + 509227.

It is an arithmetic number, because the mean of its divisors is an integer number (58534885).

Almost surely, 2^233121313 is an apocalyptic number.

It is an amenable number.

233121313 is a deficient number, since it is larger than the sum of its proper divisors (1018227).

233121313 is a wasteful number, since it uses less digits than its factorization.

233121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018226.

The product of its digits is 324, while the sum is 19.

The square root of 233121313 is about 15268.3107448074. The cubic root of 233121313 is about 615.4517253178.

Adding to 233121313 its sum of digits (19), we get a palindrome (233121332).

Adding to 233121313 its reverse (313121332), we get a palindrome (546242645).

The spelling of 233121313 in words is "two hundred thirty-three million, one hundred twenty-one thousand, three hundred thirteen".