82515137 has 4 divisors (see below), whose sum is σ = 82906416. Its totient is φ = 82123860.

The previous prime is 82515109. The next prime is 82515163. The reversal of 82515137 is 73151528.

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 a cyclic number.

It is not a de Polignac number, because 82515137 - 2⁸ = 82514881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82515107) 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, 195323 + ... + 195744.

It is an arithmetic number, because the mean of its divisors is an integer number (20726604).

Almost surely, 2^82515137 is an apocalyptic number.

It is an amenable number.

82515137 is a deficient number, since it is larger than the sum of its proper divisors (391279).

82515137 is a wasteful number, since it uses less digits than its factorization.

82515137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391278.

The product of its digits is 8400, while the sum is 32.

The square root of 82515137 is about 9083.7842885000. The cubic root of 82515137 is about 435.3560074998.

The spelling of 82515137 in words is "eighty-two million, five hundred fifteen thousand, one hundred thirty-seven".