83009221 has 4 divisors (see below), whose sum is σ = 84939712. Its totient is φ = 81078732.

The previous prime is 83009219. The next prime is 83009239. The reversal of 83009221 is 12290038.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12290038 = 2 ⋅6145019.

It is a cyclic number.

It is not a de Polignac number, because 83009221 - 2¹ = 83009219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83009261) 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, 965181 + ... + 965266.

It is an arithmetic number, because the mean of its divisors is an integer number (21234928).

Almost surely, 2^83009221 is an apocalyptic number.

It is an amenable number.

83009221 is a deficient number, since it is larger than the sum of its proper divisors (1930491).

83009221 is a wasteful number, since it uses less digits than its factorization.

83009221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930490.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 83009221 is about 9110.9396332102. The cubic root of 83009221 is about 436.2232202235.

Adding to 83009221 its reverse (12290038), we get a palindrome (95299259).

The spelling of 83009221 in words is "eighty-three million, nine thousand, two hundred twenty-one".