2131001233 has 4 divisors (see below), whose sum is σ = 2131324468. Its totient is φ = 2130678000.

The previous prime is 2131001227. The next prime is 2131001237. The reversal of 2131001233 is 3321001312.

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 1879049104 + 251952129 = 43348^2 + 15873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131001233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131001237) 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, 151518 + ... + 164983.

It is an arithmetic number, because the mean of its divisors is an integer number (532831117).

Almost surely, 2^2131001233 is an apocalyptic number.

It is an amenable number.

2131001233 is a deficient number, since it is larger than the sum of its proper divisors (323235).

2131001233 is an equidigital number, since it uses as much as digits as its factorization.

2131001233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323234.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2131001233 is about 46162.7689052552. The cubic root of 2131001233 is about 1286.8499213319.

Adding to 2131001233 its reverse (3321001312), we get a palindrome (5452002545).

The spelling of 2131001233 in words is "two billion, one hundred thirty-one million, one thousand, two hundred thirty-three".