22006731 has 8 divisors (see below), whose sum is σ = 30886720. Its totient is φ = 13898952.

The previous prime is 22006729. The next prime is 22006739. The reversal of 22006731 is 13760022.

It is a happy number.

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

It is not a de Polignac number, because 22006731 - 2¹ = 22006729 is a prime.

It is a super-2 number, since 2×22006731² = 968592418612722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22006698 and 22006707.

It is not an unprimeable number, because it can be changed into a prime (22006739) 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, 192985 + ... + 193098.

It is an arithmetic number, because the mean of its divisors is an integer number (3860840).

Almost surely, 2^22006731 is an apocalyptic number.

22006731 is a deficient number, since it is larger than the sum of its proper divisors (8879989).

22006731 is a wasteful number, since it uses less digits than its factorization.

22006731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386105.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 22006731 is about 4691.1332319601. The cubic root of 22006731 is about 280.2325067073.

Adding to 22006731 its reverse (13760022), we get a palindrome (35766753).

The spelling of 22006731 in words is "twenty-two million, six thousand, seven hundred thirty-one".