82515123 has 12 divisors (see below), whose sum is σ = 120968328. Its totient is φ = 54188640.

The previous prime is 82515109. The next prime is 82515163. The reversal of 82515123 is 32151528.

It is a happy number.

It is not a de Polignac number, because 82515123 - 2⁴ = 82515107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82515163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67818 + ... + 69023.

It is an arithmetic number, because the mean of its divisors is an integer number (10080694).

Almost surely, 2^82515123 is an apocalyptic number.

82515123 is a deficient number, since it is larger than the sum of its proper divisors (38453205).

82515123 is a wasteful number, since it uses less digits than its factorization.

82515123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136914 (or 136911 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 82515123 is about 9083.7835178961. The cubic root of 82515123 is about 435.3559828781.

The spelling of 82515123 in words is "eighty-two million, five hundred fifteen thousand, one hundred twenty-three".