22540142 has 4 divisors (see below), whose sum is σ = 33810216. Its totient is φ = 11270070.

The previous prime is 22540121. The next prime is 22540153. The reversal of 22540142 is 24104522.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5635034 + ... + 5635037.

It is an arithmetic number, because the mean of its divisors is an integer number (8452554).

Almost surely, 2^22540142 is an apocalyptic number.

22540142 is a deficient number, since it is larger than the sum of its proper divisors (11270074).

22540142 is a wasteful number, since it uses less digits than its factorization.

22540142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11270073.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22540142 is about 4747.6459429911. The cubic root of 22540142 is about 282.4785981124.

Adding to 22540142 its reverse (24104522), we get a palindrome (46644664).

The spelling of 22540142 in words is "twenty-two million, five hundred forty thousand, one hundred forty-two".