1812544243 has 2 divisors, whose sum is σ = 1812544244. Its totient is φ = 1812544242.

The previous prime is 1812544193. The next prime is 1812544249. The reversal of 1812544243 is 3424452181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812544243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1812544199 and 1812544208.

It is not a weakly prime, because it can be changed into another prime (1812544249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906272121 + 906272122.

It is an arithmetic number, because the mean of its divisors is an integer number (906272122).

Almost surely, 2^1812544243 is an apocalyptic number.

1812544243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812544243 is an equidigital number, since it uses as much as digits as its factorization.

1812544243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 34.

The square root of 1812544243 is about 42573.9855193286. The cubic root of 1812544243 is about 1219.2596607883.

The spelling of 1812544243 in words is "one billion, eight hundred twelve million, five hundred forty-four thousand, two hundred forty-three".