82261131 has 4 divisors (see below), whose sum is σ = 109681512. Its totient is φ = 54840752.

The previous prime is 82261121. The next prime is 82261213. The reversal of 82261131 is 13116228.

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

It is a cyclic number.

It is not a de Polignac number, because 82261131 - 2⁵ = 82261099 is a prime.

It is a super-2 number, since 2×82261131² = 13533787346798322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82261111) 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, 13710186 + ... + 13710191.

It is an arithmetic number, because the mean of its divisors is an integer number (27420378).

Almost surely, 2^82261131 is an apocalyptic number.

82261131 is a deficient number, since it is larger than the sum of its proper divisors (27420381).

82261131 is a wasteful number, since it uses less digits than its factorization.

82261131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27420380.

The product of its digits is 576, while the sum is 24.

The square root of 82261131 is about 9069.7922247425. The cubic root of 82261131 is about 434.9088301470.

Adding to 82261131 its reverse (13116228), we get a palindrome (95377359).

The spelling of 82261131 in words is "eighty-two million, two hundred sixty-one thousand, one hundred thirty-one".