82521422462081 has 4 divisors (see below), whose sum is σ = 82560146735664. Its totient is φ = 82482698188500.

The previous prime is 82521422462071. The next prime is 82521422462123. The reversal of 82521422462081 is 18026422412528.

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 82521422462081 - 2¹⁴ = 82521422445697 is a prime.

It is a super-2 number, since 2×82521422462081² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82521422462051) 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, 19362133595 + ... + 19362137856.

It is an arithmetic number, because the mean of its divisors is an integer number (20640036683916).

Almost surely, 2^{82521422462081} is an apocalyptic number.

It is an amenable number.

82521422462081 is a deficient number, since it is larger than the sum of its proper divisors (38724273583).

82521422462081 is a wasteful number, since it uses less digits than its factorization.

82521422462081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38724273582.

The product of its (nonzero) digits is 983040, while the sum is 47.

The spelling of 82521422462081 in words is "eighty-two trillion, five hundred twenty-one billion, four hundred twenty-two million, four hundred sixty-two thousand, eighty-one".