82513911 has 4 divisors (see below), whose sum is σ = 110018552. Its totient is φ = 55009272.

The previous prime is 82513901. The next prime is 82513927. The reversal of 82513911 is 11931528.

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

It is not a de Polignac number, because 82513911 - 2⁹ = 82513399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82513901) 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, 13752316 + ... + 13752321.

It is an arithmetic number, because the mean of its divisors is an integer number (27504638).

Almost surely, 2^82513911 is an apocalyptic number.

82513911 is a deficient number, since it is larger than the sum of its proper divisors (27504641).

82513911 is a wasteful number, since it uses less digits than its factorization.

82513911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27504640.

The product of its digits is 2160, while the sum is 30.

The square root of 82513911 is about 9083.7168053611. The cubic root of 82513911 is about 435.3538513333.

The spelling of 82513911 in words is "eighty-two million, five hundred thirteen thousand, nine hundred eleven".