81219226282 has 32 divisors (see below), whose sum is σ = 129843212544. Its totient is φ = 37970380800.

The previous prime is 81219226279. The next prime is 81219226303. The reversal of 81219226282 is 28262291218.

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, 3240057 + ... + 3265027.

It is an arithmetic number, because the mean of its divisors is an integer number (4057600392).

Almost surely, 2^81219226282 is an apocalyptic number.

81219226282 is a deficient number, since it is larger than the sum of its proper divisors (48623986262).

81219226282 is a wasteful number, since it uses less digits than its factorization.

81219226282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25614.

The product of its digits is 110592, while the sum is 43.

The spelling of 81219226282 in words is "eighty-one billion, two hundred nineteen million, two hundred twenty-six thousand, two hundred eighty-two".