82470421531 has 16 divisors (see below), whose sum is σ = 85802427360. Its totient is φ = 79171948800.

The previous prime is 82470421489. The next prime is 82470421601. The reversal of 82470421531 is 13512407428.

It is not a de Polignac number, because 82470421531 - 2¹³ = 82470413339 is a prime.

It is a super-2 number, since 2×82470421531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82470461531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4944556 + ... + 4961206.

It is an arithmetic number, because the mean of its divisors is an integer number (5362651710).

Almost surely, 2^82470421531 is an apocalyptic number.

82470421531 is a deficient number, since it is larger than the sum of its proper divisors (3332005829).

82470421531 is a wasteful number, since it uses less digits than its factorization.

82470421531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17646.

The product of its (nonzero) digits is 53760, while the sum is 37.

Adding to 82470421531 its reverse (13512407428), we get a palindrome (95982828959).

The spelling of 82470421531 in words is "eighty-two billion, four hundred seventy million, four hundred twenty-one thousand, five hundred thirty-one".