22440542 has 4 divisors (see below), whose sum is σ = 33660816. Its totient is φ = 11220270.

The previous prime is 22440541. The next prime is 22440547. The reversal of 22440542 is 24504422.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610134 + ... + 5610137.

It is an arithmetic number, because the mean of its divisors is an integer number (8415204).

Almost surely, 2^22440542 is an apocalyptic number.

22440542 is a deficient number, since it is larger than the sum of its proper divisors (11220274).

22440542 is a wasteful number, since it uses less digits than its factorization.

22440542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220273.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 22440542 is about 4737.1449207302. The cubic root of 22440542 is about 282.0619132037.

Adding to 22440542 its reverse (24504422), we get a palindrome (46944964).

The spelling of 22440542 in words is "twenty-two million, four hundred forty thousand, five hundred forty-two".