82815742 has 4 divisors (see below), whose sum is σ = 124223616. Its totient is φ = 41407870.

The previous prime is 82815713. The next prime is 82815743. The reversal of 82815742 is 24751828.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82815743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20703934 + ... + 20703937.

It is an arithmetic number, because the mean of its divisors is an integer number (31055904).

Almost surely, 2^82815742 is an apocalyptic number.

82815742 is a deficient number, since it is larger than the sum of its proper divisors (41407874).

82815742 is a wasteful number, since it uses less digits than its factorization.

82815742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41407873.

The product of its digits is 35840, while the sum is 37.

The square root of 82815742 is about 9100.3154890366. The cubic root of 82815742 is about 435.8840382626.

The spelling of 82815742 in words is "eighty-two million, eight hundred fifteen thousand, seven hundred forty-two".