81488522 has 16 divisors (see below), whose sum is σ = 126408192. Its totient is φ = 39357360.

The previous prime is 81488479. The next prime is 81488551. The reversal of 81488522 is 22588418.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50228 + ... + 51824.

It is an arithmetic number, because the mean of its divisors is an integer number (7900512).

Almost surely, 2^81488522 is an apocalyptic number.

81488522 is a deficient number, since it is larger than the sum of its proper divisors (44919670).

81488522 is a wasteful number, since it uses less digits than its factorization.

81488522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453.

The product of its digits is 40960, while the sum is 38.

The square root of 81488522 is about 9027.0993126253. The cubic root of 81488522 is about 433.5429685217.

The spelling of 81488522 in words is "eighty-one million, four hundred eighty-eight thousand, five hundred twenty-two".