2131203223 has 4 divisors (see below), whose sum is σ = 2131526488. Its totient is φ = 2130879960.

The previous prime is 2131203187. The next prime is 2131203241. The reversal of 2131203223 is 3223021312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131203223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131203223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131204223) 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, 151533 + ... + 164998.

It is an arithmetic number, because the mean of its divisors is an integer number (532881622).

Almost surely, 2^2131203223 is an apocalyptic number.

2131203223 is a deficient number, since it is larger than the sum of its proper divisors (323265).

2131203223 is an equidigital number, since it uses as much as digits as its factorization.

2131203223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323264.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2131203223 is about 46164.9566554546. The cubic root of 2131203223 is about 1286.8905786842.

Adding to 2131203223 its reverse (3223021312), we get a palindrome (5354224535).

The spelling of 2131203223 in words is "two billion, one hundred thirty-one million, two hundred three thousand, two hundred twenty-three".