22727345 has 4 divisors (see below), whose sum is σ = 27272820. Its totient is φ = 18181872.

The previous prime is 22727333. The next prime is 22727347. The reversal of 22727345 is 54372722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54372722 = 2 ⋅27186361.

It can be written as a sum of positive squares in 2 ways, for example, as 2808976 + 19918369 = 1676^2 + 4463^2 .

It is a cyclic number.

It is not a de Polignac number, because 22727345 - 2¹⁶ = 22661809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22727347) 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 3 ways as a sum of consecutive naturals, for example, 2272730 + ... + 2272739.

It is an arithmetic number, because the mean of its divisors is an integer number (6818205).

Almost surely, 2^22727345 is an apocalyptic number.

It is an amenable number.

22727345 is a deficient number, since it is larger than the sum of its proper divisors (4545475).

22727345 is an equidigital number, since it uses as much as digits as its factorization.

22727345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545474.

The product of its digits is 23520, while the sum is 32.

The square root of 22727345 is about 4767.3205262495. The cubic root of 22727345 is about 283.2584677247.

It can be divided in two parts, 227 and 27345, that added together give a palindrome (27572).

The spelling of 22727345 in words is "twenty-two million, seven hundred twenty-seven thousand, three hundred forty-five".