22991312 has 10 divisors (see below), whose sum is σ = 44545698. Its totient is φ = 11495648.

The previous prime is 22991303. The next prime is 22991317. The reversal of 22991312 is 21319922.

It can be written as a sum of positive squares in only one way, i.e., 17774656 + 5216656 = 4216^2 + 2284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22991317) 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 as a sum of consecutive naturals, namely, 718463 + ... + 718494.

Almost surely, 2^22991312 is an apocalyptic number.

It is an amenable number.

22991312 is a deficient number, since it is larger than the sum of its proper divisors (21554386).

22991312 is a wasteful number, since it uses less digits than its factorization.

22991312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436965 (or 1436959 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 22991312 is about 4794.9256511441. The cubic root of 22991312 is about 284.3508854808.

The spelling of 22991312 in words is "twenty-two million, nine hundred ninety-one thousand, three hundred twelve".