82010513 has 4 divisors (see below), whose sum is σ = 88319028. Its totient is φ = 75702000.

The previous prime is 82010507. The next prime is 82010543. The reversal of 82010513 is 31501028.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17497489 + 64513024 = 4183^2 + 8032^2 .

It is a cyclic number.

It is not a de Polignac number, because 82010513 - 2⁴ = 82010497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82010543) 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, 3154238 + ... + 3154263.

It is an arithmetic number, because the mean of its divisors is an integer number (22079757).

Almost surely, 2^82010513 is an apocalyptic number.

It is an amenable number.

82010513 is a deficient number, since it is larger than the sum of its proper divisors (6308515).

82010513 is a wasteful number, since it uses less digits than its factorization.

82010513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308514.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 82010513 is about 9055.9656028499. The cubic root of 82010513 is about 434.4667142606.

The spelling of 82010513 in words is "eighty-two million, ten thousand, five hundred thirteen".