22270561 has 4 divisors (see below), whose sum is σ = 23580612. Its totient is φ = 20960512.

The previous prime is 22270543. The next prime is 22270597. The reversal of 22270561 is 16507222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16507222 = 2 ⋅8253611.

It can be written as a sum of positive squares in 2 ways, for example, as 17181025 + 5089536 = 4145^2 + 2256^2 .

It is a cyclic number.

It is not a de Polignac number, because 22270561 - 2⁵ = 22270529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22270511) 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, 655000 + ... + 655033.

It is an arithmetic number, because the mean of its divisors is an integer number (5895153).

Almost surely, 2^22270561 is an apocalyptic number.

It is an amenable number.

22270561 is a deficient number, since it is larger than the sum of its proper divisors (1310051).

22270561 is a wasteful number, since it uses less digits than its factorization.

22270561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310050.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 22270561 is about 4719.1695243973. The cubic root of 22270561 is about 281.3479266568.

Adding to 22270561 its reverse (16507222), we get a palindrome (38777783).

The spelling of 22270561 in words is "twenty-two million, two hundred seventy thousand, five hundred sixty-one".