82261513 has 4 divisors (see below), whose sum is σ = 82862100. Its totient is φ = 81660928.

The previous prime is 82261481. The next prime is 82261519. The reversal of 82261513 is 31516228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53187849 + 29073664 = 7293^2 + 5392^2 .

It is a cyclic number.

It is not a de Polignac number, because 82261513 - 2⁵ = 82261481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82261519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300088 + ... + 300361.

It is an arithmetic number, because the mean of its divisors is an integer number (20715525).

Almost surely, 2^82261513 is an apocalyptic number.

It is an amenable number.

82261513 is a deficient number, since it is larger than the sum of its proper divisors (600587).

82261513 is a wasteful number, since it uses less digits than its factorization.

82261513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600586.

The product of its digits is 2880, while the sum is 28.

The square root of 82261513 is about 9069.8132836349. The cubic root of 82261513 is about 434.9095033483.

The spelling of 82261513 in words is "eighty-two million, two hundred sixty-one thousand, five hundred thirteen".