82322573981 has 4 divisors (see below), whose sum is σ = 85901816352. Its totient is φ = 78743331612.

The previous prime is 82322573923. The next prime is 82322573999. The reversal of 82322573981 is 18937522328.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82322573981 - 2¹⁸ = 82322311837 is a prime.

It is a super-2 number, since 2×82322573981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82322573881) 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, 1789621151 + ... + 1789621196.

It is an arithmetic number, because the mean of its divisors is an integer number (21475454088).

Almost surely, 2^82322573981 is an apocalyptic number.

It is an amenable number.

82322573981 is a deficient number, since it is larger than the sum of its proper divisors (3579242371).

82322573981 is a wasteful number, since it uses less digits than its factorization.

82322573981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3579242370.

The product of its digits is 1451520, while the sum is 50.

The spelling of 82322573981 in words is "eighty-two billion, three hundred twenty-two million, five hundred seventy-three thousand, nine hundred eighty-one".