81047526 has 32 divisors (see below), whose sum is σ = 186201600. Its totient is φ = 23037696.

The previous prime is 81047513. The next prime is 81047531. The reversal of 81047526 is 62574018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3510 + ... + 13206.

It is an arithmetic number, because the mean of its divisors is an integer number (5818800).

Almost surely, 2^81047526 is an apocalyptic number.

81047526 is an abundant number, since it is smaller than the sum of its proper divisors (105154074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81047526 is a wasteful number, since it uses less digits than its factorization.

81047526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9908.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 81047526 is about 9002.6399461491. The cubic root of 81047526 is about 432.7594772052.

The spelling of 81047526 in words is "eighty-one million, forty-seven thousand, five hundred twenty-six".