1812290243 has 12 divisors (see below), whose sum is σ = 1975741560. Its totient is φ = 1657688256.

The previous prime is 1812290237. The next prime is 1812290279. The reversal of 1812290243 is 3420922181.

It is a de Polignac number, because none of the positive numbers 2^k-1812290243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812290213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40730 + ... + 72687.

It is an arithmetic number, because the mean of its divisors is an integer number (164645130).

Almost surely, 2^1812290243 is an apocalyptic number.

1812290243 is a deficient number, since it is larger than the sum of its proper divisors (163451317).

1812290243 is a wasteful number, since it uses less digits than its factorization.

1812290243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113494 (or 113465 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1812290243 is about 42571.0023725070. The cubic root of 1812290243 is about 1219.2027046759.

The spelling of 1812290243 in words is "one billion, eight hundred twelve million, two hundred ninety thousand, two hundred forty-three".