22270645 has 8 divisors (see below), whose sum is σ = 26806104. Its totient is φ = 17762304.

The previous prime is 22270627. The next prime is 22270723. The reversal of 22270645 is 54607222.

It can be written as a sum of positive squares in 4 ways, for example, as 527076 + 21743569 = 726^2 + 4663^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22270645 - 2¹³ = 22262453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4924 + ... + 8293.

It is an arithmetic number, because the mean of its divisors is an integer number (3350763).

Almost surely, 2^22270645 is an apocalyptic number.

It is an amenable number.

22270645 is a deficient number, since it is larger than the sum of its proper divisors (4535459).

22270645 is a wasteful number, since it uses less digits than its factorization.

22270645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13559.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 22270645 is about 4719.1784242599. The cubic root of 22270645 is about 281.3482803853.

Adding to 22270645 its reverse (54607222), we get a palindrome (76877867).

The spelling of 22270645 in words is "twenty-two million, two hundred seventy thousand, six hundred forty-five".