83161240 has 32 divisors (see below), whose sum is σ = 190648080. Its totient is φ = 32636032.

The previous prime is 83161231. The next prime is 83161259. The reversal of 83161240 is 4216138.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 17494 + ... + 21733.

Almost surely, 2^83161240 is an apocalyptic number.

It is an amenable number.

83161240 is an abundant number, since it is smaller than the sum of its proper divisors (107486840).

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

83161240 is a wasteful number, since it uses less digits than its factorization.

83161240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39291 (or 39287 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 83161240 is about 9119.2784802308. The cubic root of 83161240 is about 436.4893504057.

Adding to 83161240 its reverse (4216138), we get a palindrome (87377378).

The spelling of 83161240 in words is "eighty-three million, one hundred sixty-one thousand, two hundred forty".