2131243193 has 4 divisors (see below), whose sum is σ = 2166181668. Its totient is φ = 2096304720.

The previous prime is 2131243187. The next prime is 2131243307. The reversal of 2131243193 is 3913421312.

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 91546624 + 2039696569 = 9568^2 + 45163^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131243193 - 2¹⁸ = 2130981049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131243123) 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, 17469146 + ... + 17469267.

It is an arithmetic number, because the mean of its divisors is an integer number (541545417).

Almost surely, 2^2131243193 is an apocalyptic number.

It is an amenable number.

2131243193 is a deficient number, since it is larger than the sum of its proper divisors (34938475).

2131243193 is an equidigital number, since it uses as much as digits as its factorization.

2131243193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34938474.

The product of its digits is 3888, while the sum is 29.

The square root of 2131243193 is about 46165.3895575462. The cubic root of 2131243193 is about 1286.8986237006.

The spelling of 2131243193 in words is "two billion, one hundred thirty-one million, two hundred forty-three thousand, one hundred ninety-three".