22721086 has 8 divisors (see below), whose sum is σ = 34433280. Its totient is φ = 11243328.

The previous prime is 22721081. The next prime is 22721099. The reversal of 22721086 is 68012722.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22721081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58366 + ... + 58753.

It is an arithmetic number, because the mean of its divisors is an integer number (4304160).

Almost surely, 2^22721086 is an apocalyptic number.

22721086 is a deficient number, since it is larger than the sum of its proper divisors (11712194).

22721086 is a wasteful number, since it uses less digits than its factorization.

22721086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117218.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 22721086 is about 4766.6640326333. The cubic root of 22721086 is about 283.2324626704.

The spelling of 22721086 in words is "twenty-two million, seven hundred twenty-one thousand, eighty-six".