82811541 has 4 divisors (see below), whose sum is σ = 110415392. Its totient is φ = 55207692.

The previous prime is 82811537. The next prime is 82811549. The reversal of 82811541 is 14511828.

It is a happy number.

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 not a de Polignac number, because 82811541 - 2² = 82811537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82811499 and 82811508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82811549) 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, 13801921 + ... + 13801926.

It is an arithmetic number, because the mean of its divisors is an integer number (27603848).

Almost surely, 2^82811541 is an apocalyptic number.

It is an amenable number.

82811541 is a deficient number, since it is larger than the sum of its proper divisors (27603851).

82811541 is a wasteful number, since it uses less digits than its factorization.

82811541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27603850.

The product of its digits is 2560, while the sum is 30.

The square root of 82811541 is about 9100.0846699358. The cubic root of 82811541 is about 435.8766677645.

The spelling of 82811541 in words is "eighty-two million, eight hundred eleven thousand, five hundred forty-one".