82369221 has 16 divisors (see below), whose sum is σ = 120318528. Its totient is φ = 49708800.

The previous prime is 82369211. The next prime is 82369241. The reversal of 82369221 is 12296328.

It is a happy number.

It is not a de Polignac number, because 82369221 - 2⁹ = 82368709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82369211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2775 + ... + 13131.

It is an arithmetic number, because the mean of its divisors is an integer number (7519908).

Almost surely, 2^82369221 is an apocalyptic number.

It is an amenable number.

82369221 is a deficient number, since it is larger than the sum of its proper divisors (37949307).

82369221 is a wasteful number, since it uses less digits than its factorization.

82369221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612.

The product of its digits is 10368, while the sum is 33.

The square root of 82369221 is about 9075.7490599950. The cubic root of 82369221 is about 435.0992348579.

The spelling of 82369221 in words is "eighty-two million, three hundred sixty-nine thousand, two hundred twenty-one".