83131065 has 12 divisors (see below), whose sum is σ = 144093924. Its totient is φ = 44336544.

The previous prime is 83131051. The next prime is 83131093. The reversal of 83131065 is 56013138.

It can be written as a sum of positive squares in 2 ways, for example, as 57699216 + 25431849 = 7596^2 + 5043^2 .

It is not a de Polignac number, because 83131065 - 2⁵ = 83131033 is a prime.

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, 923634 + ... + 923723.

It is an arithmetic number, because the mean of its divisors is an integer number (12007827).

Almost surely, 2^83131065 is an apocalyptic number.

It is an amenable number.

83131065 is a deficient number, since it is larger than the sum of its proper divisors (60962859).

83131065 is a wasteful number, since it uses less digits than its factorization.

83131065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847368 (or 1847365 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 83131065 is about 9117.6238680919. The cubic root of 83131065 is about 436.4365507300.

The spelling of 83131065 in words is "eighty-three million, one hundred thirty-one thousand, sixty-five".