83445181 has 4 divisors (see below), whose sum is σ = 83586492. Its totient is φ = 83303872.

The previous prime is 83445179. The next prime is 83445199. The reversal of 83445181 is 18154438.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18154438 = 2 ⋅9077219.

It can be written as a sum of positive squares in 2 ways, for example, as 70056900 + 13388281 = 8370^2 + 3659^2 .

It is a cyclic number.

It is not a de Polignac number, because 83445181 - 2¹ = 83445179 is a prime.

It is a super-2 number, since 2×83445181² = 13926196464245522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83445121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69766 + ... + 70951.

It is an arithmetic number, because the mean of its divisors is an integer number (20896623).

Almost surely, 2^83445181 is an apocalyptic number.

It is an amenable number.

83445181 is a deficient number, since it is larger than the sum of its proper divisors (141311).

83445181 is a wasteful number, since it uses less digits than its factorization.

83445181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141310.

The product of its digits is 15360, while the sum is 34.

The square root of 83445181 is about 9134.8333865484. The cubic root of 83445181 is about 436.9855608793.

The spelling of 83445181 in words is "eighty-three million, four hundred forty-five thousand, one hundred eighty-one".