82215057 has 8 divisors (see below), whose sum is σ = 109937376. Its totient is φ = 54651392.

The previous prime is 82215053. The next prime is 82215139. The reversal of 82215057 is 75051228.

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 82215057 - 2² = 82215053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82215053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38448 + ... + 40529.

It is an arithmetic number, because the mean of its divisors is an integer number (13742172).

Almost surely, 2^82215057 is an apocalyptic number.

It is an amenable number.

82215057 is a deficient number, since it is larger than the sum of its proper divisors (27722319).

82215057 is a wasteful number, since it uses less digits than its factorization.

82215057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79327.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 82215057 is about 9067.2518990045. The cubic root of 82215057 is about 434.8276183141.

The spelling of 82215057 in words is "eighty-two million, two hundred fifteen thousand, fifty-seven".