84220081 has 8 divisors (see below), whose sum is σ = 93434400. Its totient is φ = 75265440.

The previous prime is 84220079. The next prime is 84220133. The reversal of 84220081 is 18002248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84220081 - 2¹ = 84220079 is a prime.

It is a super-2 number, since 2×84220081² = 14186044087293122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84220001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64236 + ... + 65533.

It is an arithmetic number, because the mean of its divisors is an integer number (11679300).

Almost surely, 2^84220081 is an apocalyptic number.

It is an amenable number.

84220081 is a deficient number, since it is larger than the sum of its proper divisors (9214319).

84220081 is a wasteful number, since it uses less digits than its factorization.

84220081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129839.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 84220081 is about 9177.1499388427. The cubic root of 84220081 is about 438.3340601831.

The spelling of 84220081 in words is "eighty-four million, two hundred twenty thousand, eighty-one".