83218141 has 4 divisors (see below), whose sum is σ = 83247484. Its totient is φ = 83188800.

The previous prime is 83218133. The next prime is 83218159. The reversal of 83218141 is 14181238.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14181238 = 2 ⋅7090619.

It can be written as a sum of positive squares in 2 ways, for example, as 12574116 + 70644025 = 3546^2 + 8405^2 .

It is a cyclic number.

It is not a de Polignac number, because 83218141 - 2³ = 83218133 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83218171) 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, 9900 + ... + 16261.

It is an arithmetic number, because the mean of its divisors is an integer number (20811871).

Almost surely, 2^83218141 is an apocalyptic number.

It is an amenable number.

83218141 is a deficient number, since it is larger than the sum of its proper divisors (29343).

83218141 is a wasteful number, since it uses less digits than its factorization.

83218141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29342.

The product of its digits is 1536, while the sum is 28.

The square root of 83218141 is about 9122.3977659385. The cubic root of 83218141 is about 436.5888800185.

Adding to 83218141 its reverse (14181238), we get a palindrome (97399379).

The spelling of 83218141 in words is "eighty-three million, two hundred eighteen thousand, one hundred forty-one".