82434431 has 4 divisors (see below), whose sum is σ = 82455912. Its totient is φ = 82412952.

The previous prime is 82434427. The next prime is 82434437. The reversal of 82434431 is 13443428.

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 82434431 - 2² = 82434427 is a prime.

It is a super-2 number, since 2×82434431² = 13590870828587522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82434394 and 82434403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82434437) 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, 3236 + ... + 13241.

It is an arithmetic number, because the mean of its divisors is an integer number (20613978).

Almost surely, 2^82434431 is an apocalyptic number.

82434431 is a deficient number, since it is larger than the sum of its proper divisors (21481).

82434431 is a wasteful number, since it uses less digits than its factorization.

82434431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21480.

The product of its digits is 9216, while the sum is 29.

The square root of 82434431 is about 9079.3408901748. The cubic root of 82434431 is about 435.2140242443.

Adding to 82434431 its reverse (13443428), we get a palindrome (95877859).

The spelling of 82434431 in words is "eighty-two million, four hundred thirty-four thousand, four hundred thirty-one".