81082510 has 16 divisors (see below), whose sum is σ = 146250000. Its totient is φ = 32366016.

The previous prime is 81082501. The next prime is 81082513. The reversal of 81082510 is 1528018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81082513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3135 + ... + 13114.

It is an arithmetic number, because the mean of its divisors is an integer number (9140625).

Almost surely, 2^81082510 is an apocalyptic number.

81082510 is a deficient number, since it is larger than the sum of its proper divisors (65167490).

81082510 is a wasteful number, since it uses less digits than its factorization.

81082510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16755.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 81082510 is about 9004.5827221477. The cubic root of 81082510 is about 432.8217348314.

The spelling of 81082510 in words is "eighty-one million, eighty-two thousand, five hundred ten".