1851851825 has 12 divisors (see below), whose sum is σ = 2312820720. Its totient is φ = 1470820560.

The previous prime is 1851851801. The next prime is 1851851851. The reversal of 1851851825 is 5281581581.

It is not a de Polignac number, because 1851851825 - 2¹⁰ = 1851850801 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262979 + ... + 269928.

It is an arithmetic number, because the mean of its divisors is an integer number (192735060).

Almost surely, 2^1851851825 is an apocalyptic number.

It is an amenable number.

1851851825 is a deficient number, since it is larger than the sum of its proper divisors (460968895).

1851851825 is a wasteful number, since it uses less digits than its factorization.

1851851825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533056 (or 533051 counting only the distinct ones).

The product of its digits is 128000, while the sum is 44.

The square root of 1851851825 is about 43033.1479792032. The cubic root of 1851851825 is about 1228.0104936114.

The spelling of 1851851825 in words is "one billion, eight hundred fifty-one million, eight hundred fifty-one thousand, eight hundred twenty-five".