83213140 has 24 divisors (see below), whose sum is σ = 175867272. Its totient is φ = 33072000.

The previous prime is 83213071. The next prime is 83213153. The reversal of 83213140 is 4131238.

It can be written as a sum of positive squares in 4 ways, for example, as 1527696 + 81685444 = 1236^2 + 9038^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10111 + ... + 16390.

It is an arithmetic number, because the mean of its divisors is an integer number (7327803).

Almost surely, 2^83213140 is an apocalyptic number.

It is an amenable number.

83213140 is an abundant number, since it is smaller than the sum of its proper divisors (92654132).

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

83213140 is a wasteful number, since it uses less digits than its factorization.

83213140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26667 (or 26665 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 83213140 is about 9122.1236562546. The cubic root of 83213140 is about 436.5801342302.

Adding to 83213140 its reverse (4131238), we get a palindrome (87344378).

The spelling of 83213140 in words is "eighty-three million, two hundred thirteen thousand, one hundred forty".