83221538 has 8 divisors (see below), whose sum is σ = 126119532. Its totient is φ = 41181696.

The previous prime is 83221531. The next prime is 83221543. The reversal of 83221538 is 83512238.

It can be written as a sum of positive squares in 2 ways, for example, as 82937449 + 284089 = 9107^2 + 533^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83221531) 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, 214295 + ... + 214682.

Almost surely, 2^83221538 is an apocalyptic number.

83221538 is a deficient number, since it is larger than the sum of its proper divisors (42897994).

83221538 is a wasteful number, since it uses less digits than its factorization.

83221538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429076.

The product of its digits is 11520, while the sum is 32.

The square root of 83221538 is about 9122.5839541218. The cubic root of 83221538 is about 436.5948205191.

The spelling of 83221538 in words is "eighty-three million, two hundred twenty-one thousand, five hundred thirty-eight".