81054722 has 48 divisors (see below), whose sum is σ = 150698880. Its totient is φ = 32508000.

The previous prime is 81054719. The next prime is 81054733. The reversal of 81054722 is 22745018.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187847 + ... + 188277.

It is an arithmetic number, because the mean of its divisors is an integer number (3139560).

Almost surely, 2^81054722 is an apocalyptic number.

81054722 is a deficient number, since it is larger than the sum of its proper divisors (69644158).

81054722 is a wasteful number, since it uses less digits than its factorization.

81054722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 81054722 is about 9003.0395978247. The cubic root of 81054722 is about 432.7722846907.

The spelling of 81054722 in words is "eighty-one million, fifty-four thousand, seven hundred twenty-two".