22228351778 has 8 divisors (see below), whose sum is σ = 33343941072. Its totient is φ = 11113704756.

The previous prime is 22228351763. The next prime is 22228351787. The reversal of 22228351778 is 87715382222.

22228351778 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×22228351778² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173300 + ... + 272927.

It is an arithmetic number, because the mean of its divisors is an integer number (4167992634).

Almost surely, 2^22228351778 is an apocalyptic number.

22228351778 is a deficient number, since it is larger than the sum of its proper divisors (11115589294).

22228351778 is a wasteful number, since it uses less digits than its factorization.

22228351778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471136.

The product of its digits is 752640, while the sum is 47.

The spelling of 22228351778 in words is "twenty-two billion, two hundred twenty-eight million, three hundred fifty-one thousand, seven hundred seventy-eight".