1819983931231 has 2 divisors, whose sum is σ = 1819983931232. Its totient is φ = 1819983931230.

The previous prime is 1819983931187. The next prime is 1819983931351. The reversal of 1819983931231 is 1321393899181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1819983931231 - 2²⁵ = 1819950376799 is a prime.

It is a super-2 number, since 2×1819983931231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1819983131231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909991965615 + 909991965616.

It is an arithmetic number, because the mean of its divisors is an integer number (909991965616).

Almost surely, 2^{1819983931231} is an apocalyptic number.

1819983931231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1819983931231 is an equidigital number, since it uses as much as digits as its factorization.

1819983931231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 58.

The spelling of 1819983931231 in words is "one trillion, eight hundred nineteen billion, nine hundred eighty-three million, nine hundred thirty-one thousand, two hundred thirty-one".