233132661 has 10 divisors (see below), whose sum is σ = 348260022. Its totient is φ = 155421720.

The previous prime is 233132651. The next prime is 233132663. The reversal of 233132661 is 166231332.

It is a happy number.

233132661 is a `hidden beast` number, since 2 + 331 + 326 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 146531025 + 86601636 = 12105^2 + 9306^2 .

It is not a de Polignac number, because 233132661 - 2⁵ = 233132629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233132663) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1439010 + ... + 1439171.

Almost surely, 2^233132661 is an apocalyptic number.

It is an amenable number.

233132661 is a deficient number, since it is larger than the sum of its proper divisors (115127361).

233132661 is an equidigital number, since it uses as much as digits as its factorization.

233132661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878193 (or 2878184 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 233132661 is about 15268.6823596537. The cubic root of 233132661 is about 615.4617115817.

Adding to 233132661 its reverse (166231332), we get a palindrome (399363993).

The spelling of 233132661 in words is "two hundred thirty-three million, one hundred thirty-two thousand, six hundred sixty-one".