233142891 has 4 divisors (see below), whose sum is σ = 310857192. Its totient is φ = 155428592.

The previous prime is 233142853. The next prime is 233142941. The reversal of 233142891 is 198241332.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 233142891 - 2¹⁷ = 233011819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (233142841) 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, 38857146 + ... + 38857151.

It is an arithmetic number, because the mean of its divisors is an integer number (77714298).

Almost surely, 2^233142891 is an apocalyptic number.

233142891 is a deficient number, since it is larger than the sum of its proper divisors (77714301).

233142891 is an equidigital number, since it uses as much as digits as its factorization.

233142891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77714300.

The product of its digits is 10368, while the sum is 33.

The square root of 233142891 is about 15269.0173554162. The cubic root of 233142891 is about 615.4707137255.

The spelling of 233142891 in words is "two hundred thirty-three million, one hundred forty-two thousand, eight hundred ninety-one".