2133578231 has 4 divisors (see below), whose sum is σ = 2146667832. Its totient is φ = 2120488632.

The previous prime is 2133578189. The next prime is 2133578261. The reversal of 2133578231 is 1328753312.

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 2133578231 - 2¹⁰ = 2133577207 is a prime.

It is a super-2 number, since 2×2133578231² = 9104312135594178722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2133578191 and 2133578200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133578261) 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, 6544556 + ... + 6544881.

It is an arithmetic number, because the mean of its divisors is an integer number (536666958).

Almost surely, 2^2133578231 is an apocalyptic number.

2133578231 is a deficient number, since it is larger than the sum of its proper divisors (13089601).

2133578231 is a wasteful number, since it uses less digits than its factorization.

2133578231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13089600.

The product of its digits is 30240, while the sum is 35.

The square root of 2133578231 is about 46190.6725540991. The cubic root of 2133578231 is about 1287.3684371930.

The spelling of 2133578231 in words is "two billion, one hundred thirty-three million, five hundred seventy-eight thousand, two hundred thirty-one".