81022955 has 32 divisors (see below), whose sum is σ = 110496960. Its totient is φ = 56609280.

The previous prime is 81022943. The next prime is 81022979. The reversal of 81022955 is 55922018.

It is not a de Polignac number, because 81022955 - 2⁸ = 81022699 is a prime.

It is a super-3 number, since 3×81022955³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99500 + ... + 100310.

It is an arithmetic number, because the mean of its divisors is an integer number (3453030).

Almost surely, 2^81022955 is an apocalyptic number.

81022955 is a deficient number, since it is larger than the sum of its proper divisors (29474005).

81022955 is a wasteful number, since it uses less digits than its factorization.

81022955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 81022955 is about 9001.2751874387. The cubic root of 81022955 is about 432.7157398724.

The spelling of 81022955 in words is "eighty-one million, twenty-two thousand, nine hundred fifty-five".