22131300042 has 12 divisors (see below), whose sum is σ = 47951150130. Its totient is φ = 7377100008.

The previous prime is 22131300041. The next prime is 22131300049. The reversal of 22131300042 is 24000313122.

It can be written as a sum of positive squares in only one way, i.e., 17864728281 + 4266571761 = 133659^2 + 65319^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1229516669 = 22131300042 / (2 + 2 + 1 + 3 + 1 + 3 + 0 + 0 + 0 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 22131299988 and 22131300024.

It is not an unprimeable number, because it can be changed into a prime (22131300041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 614758317 + ... + 614758352.

Almost surely, 2^22131300042 is an apocalyptic number.

22131300042 is an abundant number, since it is smaller than the sum of its proper divisors (25819850088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22131300042 is a wasteful number, since it uses less digits than its factorization.

22131300042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229516677 (or 1229516674 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22131300042 its reverse (24000313122), we get a palindrome (46131613164).

The spelling of 22131300042 in words is "twenty-two billion, one hundred thirty-one million, three hundred thousand, forty-two".