82433521 has 8 divisors (see below), whose sum is σ = 85000680. Its totient is φ = 79884288.

The previous prime is 82433503. The next prime is 82433531. The reversal of 82433521 is 12533428.

It can be written as a sum of positive squares in 4 ways, for example, as 52403121 + 30030400 = 7239^2 + 5480^2 .

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 82433521 - 2¹⁵ = 82400753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82433521.

It is not an unprimeable number, because it can be changed into a prime (82433531) 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, 5175 + ... + 13843.

It is an arithmetic number, because the mean of its divisors is an integer number (10625085).

Almost surely, 2^82433521 is an apocalyptic number.

It is an amenable number.

82433521 is a deficient number, since it is larger than the sum of its proper divisors (2567159).

82433521 is a wasteful number, since it uses less digits than its factorization.

82433521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963.

The product of its digits is 5760, while the sum is 28.

The square root of 82433521 is about 9079.2907762666. The cubic root of 82433521 is about 435.2124227847.

Adding to 82433521 its reverse (12533428), we get a palindrome (94966949).

The spelling of 82433521 in words is "eighty-two million, four hundred thirty-three thousand, five hundred twenty-one".