22075681 has 8 divisors (see below), whose sum is σ = 22580480. Its totient is φ = 21576672.

The previous prime is 22075679. The next prime is 22075687. The reversal of 22075681 is 18657022.

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 22075681 - 2¹ = 22075679 is a prime.

It is a super-2 number, since 2×22075681² = 974671383227522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22075687) 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, 6781 + ... + 9493.

It is an arithmetic number, because the mean of its divisors is an integer number (2822560).

Almost surely, 2^22075681 is an apocalyptic number.

22075681 is the 2713-rd octagonal number.

It is an amenable number.

22075681 is a deficient number, since it is larger than the sum of its proper divisors (504799).

22075681 is a wasteful number, since it uses less digits than its factorization.

22075681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 22075681 is about 4698.4764551927. The cubic root of 22075681 is about 280.5248700892.

The spelling of 22075681 in words is "twenty-two million, seventy-five thousand, six hundred eighty-one".