233605381 has 4 divisors (see below), whose sum is σ = 247346892. Its totient is φ = 219863872.

The previous prime is 233605327. The next prime is 233605387. The reversal of 233605381 is 183506332.

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 82192356 + 151413025 = 9066^2 + 12305^2 .

It is a cyclic number.

It is not a de Polignac number, because 233605381 - 2⁹ = 233604869 is a prime.

It is a super-2 number, since 2×233605381² = 109142948064310322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233605387) 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, 6870730 + ... + 6870763.

It is an arithmetic number, because the mean of its divisors is an integer number (61836723).

Almost surely, 2^233605381 is an apocalyptic number.

It is an amenable number.

233605381 is a deficient number, since it is larger than the sum of its proper divisors (13741511).

233605381 is a wasteful number, since it uses less digits than its factorization.

233605381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13741510.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 233605381 is about 15284.1545726285. The cubic root of 233605381 is about 615.8774185794.

The spelling of 233605381 in words is "two hundred thirty-three million, six hundred five thousand, three hundred eighty-one".