22155140242 has 8 divisors (see below), whose sum is σ = 33859742796. Its totient is φ = 10868559312.

The previous prime is 22155140239. The next prime is 22155140243. The reversal of 22155140242 is 24204155122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20969646481 + 1185493761 = 144809^2 + 34431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22155140242.

It is not an unprimeable number, because it can be changed into a prime (22155140243) 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, 104505273 + ... + 104505484.

Almost surely, 2^22155140242 is an apocalyptic number.

22155140242 is a deficient number, since it is larger than the sum of its proper divisors (11704602554).

22155140242 is a wasteful number, since it uses less digits than its factorization.

22155140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209010812.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 22155140242 its reverse (24204155122), we get a palindrome (46359295364).

The spelling of 22155140242 in words is "twenty-two billion, one hundred fifty-five million, one hundred forty thousand, two hundred forty-two".