22778313 has 8 divisors (see below), whose sum is σ = 30502368. Its totient is φ = 15119904.

The previous prime is 22778309. The next prime is 22778333. The reversal of 22778313 is 31387722.

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

It is not a de Polignac number, because 22778313 - 2² = 22778309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22778333) 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 7 ways as a sum of consecutive naturals, for example, 15595 + ... + 16992.

It is an arithmetic number, because the mean of its divisors is an integer number (3812796).

Almost surely, 2^22778313 is an apocalyptic number.

It is an amenable number.

22778313 is a deficient number, since it is larger than the sum of its proper divisors (7724055).

22778313 is a wasteful number, since it uses less digits than its factorization.

22778313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32823.

The product of its digits is 14112, while the sum is 33.

The square root of 22778313 is about 4772.6630930750. The cubic root of 22778313 is about 283.4700533551.

The spelling of 22778313 in words is "twenty-two million, seven hundred seventy-eight thousand, three hundred thirteen".