22406331 has 8 divisors (see below), whose sum is σ = 29906944. Its totient is φ = 14921640.

The previous prime is 22406327. The next prime is 22406359. The reversal of 22406331 is 13360422.

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 22406331 - 2² = 22406327 is a prime.

It is a super-2 number, since 2×22406331² = 1004087337763122, 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 = 22406298 and 22406307.

It is not an unprimeable number, because it can be changed into a prime (22406381) 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, 175 + ... + 6696.

It is an arithmetic number, because the mean of its divisors is an integer number (3738368).

Almost surely, 2^22406331 is an apocalyptic number.

22406331 is a deficient number, since it is larger than the sum of its proper divisors (7500613).

22406331 is a wasteful number, since it uses less digits than its factorization.

22406331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7961.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 22406331 is about 4733.5326131759. The cubic root of 22406331 is about 281.9185041907.

Adding to 22406331 its reverse (13360422), we get a palindrome (35766753).

The spelling of 22406331 in words is "twenty-two million, four hundred six thousand, three hundred thirty-one".