1812552172 has 12 divisors (see below), whose sum is σ = 3358552680. Its totient is φ = 852965696.

The previous prime is 1812552169. The next prime is 1812552193. The reversal of 1812552172 is 2712552181.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 13327522 + ... + 13327657.

It is an arithmetic number, because the mean of its divisors is an integer number (279879390).

Almost surely, 2^1812552172 is an apocalyptic number.

It is an amenable number.

1812552172 is a deficient number, since it is larger than the sum of its proper divisors (1546000508).

1812552172 is a wasteful number, since it uses less digits than its factorization.

1812552172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26655200 (or 26655198 counting only the distinct ones).

The product of its digits is 11200, while the sum is 34.

The square root of 1812552172 is about 42574.0786394726. The cubic root of 1812552172 is about 1219.2614386752.

Subtracting 1812552172 from its reverse (2712552181), we obtain a palindrome (900000009).

The spelling of 1812552172 in words is "one billion, eight hundred twelve million, five hundred fifty-two thousand, one hundred seventy-two".