1819472285 has 4 divisors (see below), whose sum is σ = 2183366748. Its totient is φ = 1455577824.

The previous prime is 1819472269. The next prime is 1819472297. The reversal of 1819472285 is 5822749181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5822749181 = 8861 ⋅657121.

It can be written as a sum of positive squares in 2 ways, for example, as 821796889 + 997675396 = 28667^2 + 31586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1819472285 - 2⁴ = 1819472269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181947224 + ... + 181947233.

It is an arithmetic number, because the mean of its divisors is an integer number (545841687).

Almost surely, 2^1819472285 is an apocalyptic number.

It is an amenable number.

1819472285 is a deficient number, since it is larger than the sum of its proper divisors (363894463).

1819472285 is an equidigital number, since it uses as much as digits as its factorization.

1819472285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363894462.

The product of its digits is 322560, while the sum is 47.

The square root of 1819472285 is about 42655.2726518071. The cubic root of 1819472285 is about 1220.8111341957.

The spelling of 1819472285 in words is "one billion, eight hundred nineteen million, four hundred seventy-two thousand, two hundred eighty-five".