22128631 has 8 divisors (see below), whose sum is σ = 25335680. Its totient is φ = 18933048.

The previous prime is 22128629. The next prime is 22128649. The reversal of 22128631 is 13682122.

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 22128631 - 2¹ = 22128629 is a prime.

It is a super-2 number, since 2×22128631² = 979352619868322, 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 = 22128596 and 22128605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22128731) 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, 1780 + ... + 6886.

It is an arithmetic number, because the mean of its divisors is an integer number (3166960).

Almost surely, 2^22128631 is an apocalyptic number.

22128631 is a deficient number, since it is larger than the sum of its proper divisors (3207049).

22128631 is an equidigital number, since it uses as much as digits as its factorization.

22128631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733.

The product of its digits is 1152, while the sum is 25.

The square root of 22128631 is about 4704.1078856676. The cubic root of 22128631 is about 280.7489769051.

The spelling of 22128631 in words is "twenty-two million, one hundred twenty-eight thousand, six hundred thirty-one".