22242547 has 4 divisors (see below), whose sum is σ = 22365616. Its totient is φ = 22119480.

The previous prime is 22242533. The next prime is 22242553. The reversal of 22242547 is 74524222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74524222 = 2 ⋅37262111.

It is a cyclic number.

It is not a de Polignac number, because 22242547 - 2⁷ = 22242419 is a prime.

It is a super-4 number, since 4×22242547⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22242047) 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, 61263 + ... + 61624.

It is an arithmetic number, because the mean of its divisors is an integer number (5591404).

Almost surely, 2^22242547 is an apocalyptic number.

22242547 is a deficient number, since it is larger than the sum of its proper divisors (123069).

22242547 is a wasteful number, since it uses less digits than its factorization.

22242547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123068.

The product of its digits is 8960, while the sum is 28.

The square root of 22242547 is about 4716.2004834400. The cubic root of 22242547 is about 281.2299085565.

Adding to 22242547 its reverse (74524222), we get a palindrome (96766769).

The spelling of 22242547 in words is "twenty-two million, two hundred forty-two thousand, five hundred forty-seven".