82791550 has 24 divisors (see below), whose sum is σ = 162099000. Its totient is φ = 31373280.

The previous prime is 82791529. The next prime is 82791557. The reversal of 82791550 is 5519728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82791557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42625 + ... + 44524.

It is an arithmetic number, because the mean of its divisors is an integer number (6754125).

Almost surely, 2^82791550 is an apocalyptic number.

82791550 is a deficient number, since it is larger than the sum of its proper divisors (79307450).

82791550 is a wasteful number, since it uses less digits than its factorization.

82791550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87180 (or 87175 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 82791550 is about 9098.9862072651. The cubic root of 82791550 is about 435.8415908835.

The spelling of 82791550 in words is "eighty-two million, seven hundred ninety-one thousand, five hundred fifty".