22106731 has 4 divisors (see below), whose sum is σ = 22268232. Its totient is φ = 21945232.

The previous prime is 22106719. The next prime is 22106737. The reversal of 22106731 is 13760122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13760122 = 2 ⋅6880061.

It is a cyclic number.

It is not a de Polignac number, because 22106731 - 2¹⁹ = 21582443 is a prime.

It is a super-2 number, since 2×22106731² = 977415111012722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22106737) 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, 80545 + ... + 80818.

It is an arithmetic number, because the mean of its divisors is an integer number (5567058).

Almost surely, 2^22106731 is an apocalyptic number.

22106731 is a deficient number, since it is larger than the sum of its proper divisors (161501).

22106731 is a wasteful number, since it uses less digits than its factorization.

22106731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161500.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 22106731 is about 4701.7795567211. The cubic root of 22106731 is about 280.6563302338.

Adding to 22106731 its reverse (13760122), we get a palindrome (35866853).

The spelling of 22106731 in words is "twenty-two million, one hundred six thousand, seven hundred thirty-one".