22120547 has 4 divisors (see below), whose sum is σ = 22432176. Its totient is φ = 21808920.

The previous prime is 22120543. The next prime is 22120573. The reversal of 22120547 is 74502122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22120547 - 2² = 22120543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22120543) 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, 155708 + ... + 155849.

It is an arithmetic number, because the mean of its divisors is an integer number (5608044).

Almost surely, 2^22120547 is an apocalyptic number.

22120547 is a deficient number, since it is larger than the sum of its proper divisors (311629).

22120547 is an equidigital number, since it uses as much as digits as its factorization.

22120547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311628.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 22120547 is about 4703.2485581776. The cubic root of 22120547 is about 280.7147851355.

Adding to 22120547 its reverse (74502122), we get a palindrome (96622669).

The spelling of 22120547 in words is "twenty-two million, one hundred twenty thousand, five hundred forty-seven".