82404451 has 4 divisors (see below), whose sum is σ = 82436152. Its totient is φ = 82372752.

The previous prime is 82404437. The next prime is 82404503. The reversal of 82404451 is 15440428.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82404451 - 2⁹ = 82403939 is a prime.

It is a super-2 number, since 2×82404451² = 13580987089222802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82404401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11565 + ... + 17278.

It is an arithmetic number, because the mean of its divisors is an integer number (20609038).

Almost surely, 2^82404451 is an apocalyptic number.

82404451 is a deficient number, since it is larger than the sum of its proper divisors (31701).

82404451 is a wasteful number, since it uses less digits than its factorization.

82404451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31700.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 82404451 is about 9077.6897391352. The cubic root of 82404451 is about 435.1612578684.

Adding to 82404451 its reverse (15440428), we get a palindrome (97844879).

The spelling of 82404451 in words is "eighty-two million, four hundred four thousand, four hundred fifty-one".