82244021 has 8 divisors (see below), whose sum is σ = 86002560. Its totient is φ = 78500752.

The previous prime is 82244017. The next prime is 82244033. The reversal of 82244021 is 12044228.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 82244021 - 2² = 82244017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82244621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8015 + ... + 15123.

It is an arithmetic number, because the mean of its divisors is an integer number (10750320).

Almost surely, 2^82244021 is an apocalyptic number.

It is an amenable number.

82244021 is a deficient number, since it is larger than the sum of its proper divisors (3758539).

82244021 is a wasteful number, since it uses less digits than its factorization.

82244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7635.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 82244021 is about 9068.8489346774. The cubic root of 82244021 is about 434.8786749328.

Adding to 82244021 its reverse (12044228), we get a palindrome (94288249).

The spelling of 82244021 in words is "eighty-two million, two hundred forty-four thousand, twenty-one".