83511172 has 6 divisors (see below), whose sum is σ = 146144558. Its totient is φ = 41755584.

The previous prime is 83511149. The next prime is 83511173. The reversal of 83511172 is 27111538.

It can be written as a sum of positive squares in only one way, i.e., 63744256 + 19766916 = 7984^2 + 4446^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 83511172.

It is not an unprimeable number, because it can be changed into a prime (83511173) by changing a digit.

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 as a sum of consecutive naturals, namely, 10438893 + ... + 10438900.

Almost surely, 2^83511172 is an apocalyptic number.

It is an amenable number.

83511172 is a deficient number, since it is larger than the sum of its proper divisors (62633386).

83511172 is a wasteful number, since it uses less digits than its factorization.

83511172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20877797 (or 20877795 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 83511172 is about 9138.4447254443. Note that the first 3 decimals coincide. The cubic root of 83511172 is about 437.1007243730.

The spelling of 83511172 in words is "eighty-three million, five hundred eleven thousand, one hundred seventy-two".