81074524 has 12 divisors (see below), whose sum is σ = 144557784. Its totient is φ = 39772304.

The previous prime is 81074509. The next prime is 81074533. The reversal of 81074524 is 42547018.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 191002 + ... + 191425.

It is an arithmetic number, because the mean of its divisors is an integer number (12046482).

Almost surely, 2^81074524 is an apocalyptic number.

It is an amenable number.

81074524 is a deficient number, since it is larger than the sum of its proper divisors (63483260).

81074524 is a wasteful number, since it uses less digits than its factorization.

81074524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382484 (or 382482 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 81074524 is about 9004.1392703578. The cubic root of 81074524 is about 432.8075245007.

The spelling of 81074524 in words is "eighty-one million, seventy-four thousand, five hundred twenty-four".