82101515 has 8 divisors (see below), whose sum is σ = 98675280. Its totient is φ = 65578912.

The previous prime is 82101493. The next prime is 82101529. The reversal of 82101515 is 51510128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82101515 - 2¹⁶ = 82035979 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9164 + ... + 15753.

It is an arithmetic number, because the mean of its divisors is an integer number (12334410).

Almost surely, 2^82101515 is an apocalyptic number.

82101515 is a deficient number, since it is larger than the sum of its proper divisors (16573765).

82101515 is a wasteful number, since it uses less digits than its factorization.

82101515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25581.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 82101515 is about 9060.9886325941. The cubic root of 82101515 is about 434.6273551486.

The spelling of 82101515 in words is "eighty-two million, one hundred one thousand, five hundred fifteen".