82815070 has 24 divisors (see below), whose sum is σ = 161419176. Its totient is φ = 30577248.

The previous prime is 82815067. The next prime is 82815077. The reversal of 82815070 is 7051828.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82815077) 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, 22812 + ... + 26191.

It is an arithmetic number, because the mean of its divisors is an integer number (6725799).

Almost surely, 2^82815070 is an apocalyptic number.

82815070 is a deficient number, since it is larger than the sum of its proper divisors (78604106).

82815070 is a wasteful number, since it uses less digits than its factorization.

82815070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49036 (or 49023 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 82815070 is about 9100.2785671649. The cubic root of 82815070 is about 435.8828592804.

Adding to 82815070 its reverse (7051828), we get a palindrome (89866898).

The spelling of 82815070 in words is "eighty-two million, eight hundred fifteen thousand, seventy".