22220377 has 4 divisors (see below), whose sum is σ = 23527476. Its totient is φ = 20913280.

The previous prime is 22220371. The next prime is 22220381. The reversal of 22220377 is 77302222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7901721 + 14318656 = 2811^2 + 3784^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220377 - 2⁷ = 22220249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653524 + ... + 653557.

It is an arithmetic number, because the mean of its divisors is an integer number (5881869).

Almost surely, 2^22220377 is an apocalyptic number.

It is an amenable number.

22220377 is a deficient number, since it is larger than the sum of its proper divisors (1307099).

22220377 is a wasteful number, since it uses less digits than its factorization.

22220377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307098.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 22220377 is about 4713.8494884754. The cubic root of 22220377 is about 281.1364399484.

Adding to 22220377 its reverse (77302222), we get a palindrome (99522599).

The spelling of 22220377 in words is "twenty-two million, two hundred twenty thousand, three hundred seventy-seven".