1983515172 has 12 divisors (see below), whose sum is σ = 4628202096. Its totient is φ = 661171720.

The previous prime is 1983515161. The next prime is 1983515189. The reversal of 1983515172 is 2715153891.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82646454 + ... + 82646477.

It is an arithmetic number, because the mean of its divisors is an integer number (385683508).

Almost surely, 2^1983515172 is an apocalyptic number.

1983515172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1983515172 is an abundant number, since it is smaller than the sum of its proper divisors (2644686924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1983515172 is a wasteful number, since it uses less digits than its factorization.

1983515172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165292938 (or 165292936 counting only the distinct ones).

The product of its digits is 75600, while the sum is 42.

The square root of 1983515172 is about 44536.6722151532. The cubic root of 1983515172 is about 1256.4498984985.

The spelling of 1983515172 in words is "one billion, nine hundred eighty-three million, five hundred fifteen thousand, one hundred seventy-two".