22312506 has 8 divisors (see below), whose sum is σ = 44625024. Its totient is φ = 7437500.

The previous prime is 22312501. The next prime is 22312547. The reversal of 22312506 is 60521322.

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

22312506 is an admirable number.

It is a super-3 number, since 3×22312506³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22312501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859370 + ... + 1859381.

It is an arithmetic number, because the mean of its divisors is an integer number (5578128).

Almost surely, 2^22312506 is an apocalyptic number.

22312506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22312506 is a wasteful number, since it uses less digits than its factorization.

22312506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718756.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22312506 is about 4723.6115420301. The cubic root of 22312506 is about 281.5244487429.

Adding to 22312506 its reverse (60521322), we get a palindrome (82833828).

The spelling of 22312506 in words is "twenty-two million, three hundred twelve thousand, five hundred six".