82134401281 has 3 divisors (see below), whose sum is σ = 82134687873. Its totient is φ = 82134114690.

The previous prime is 82134401269. The next prime is 82134401303. The reversal of 82134401281 is 18210443128.

The square root of 82134401281 is 286591.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 82134401281 - 2¹⁷ = 82134270209 is a prime.

It is a super-2 number, since 2×82134401281² (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 (82134401221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 143296 + ... + 429886.

It is an arithmetic number, because the mean of its divisors is an integer number (27378229291).

Almost surely, 2^82134401281 is an apocalyptic number.

82134401281 is the 286591-st square number.

82134401281 is the 143296-th centered octagonal number.

It is an amenable number.

82134401281 is a deficient number, since it is larger than the sum of its proper divisors (286592).

82134401281 is an frugal number, since it uses more digits than its factorization.

82134401281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573182 (or 286591 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The spelling of 82134401281 in words is "eighty-two billion, one hundred thirty-four million, four hundred one thousand, two hundred eighty-one".