22070981 has 8 divisors (see below), whose sum is σ = 24001560. Its totient is φ = 20210688.

The previous prime is 22070969. The next prime is 22070987. The reversal of 22070981 is 18907022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14508481 + 7562500 = 3809^2 + 2750^2 .

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

It is not a de Polignac number, because 22070981 - 2¹⁸ = 21808837 is a prime.

It is a super-2 number, since 2×22070981² = 974256404604722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22070987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16916 + ... + 18173.

It is an arithmetic number, because the mean of its divisors is an integer number (3000195).

Almost surely, 2^22070981 is an apocalyptic number.

It is an amenable number.

22070981 is a deficient number, since it is larger than the sum of its proper divisors (1930579).

22070981 is a wasteful number, since it uses less digits than its factorization.

22070981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35143.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 22070981 is about 4697.9762664364. The cubic root of 22070981 is about 280.5049603905.

The spelling of 22070981 in words is "twenty-two million, seventy thousand, nine hundred eighty-one".