22420142231 has 4 divisors (see below), whose sum is σ = 22596678912. Its totient is φ = 22243605552.

The previous prime is 22420142219. The next prime is 22420142257. The reversal of 22420142231 is 13224102422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13224102422 = 2 ⋅6612051211.

It is a cyclic number.

It is not a de Polignac number, because 22420142231 - 2⁶ = 22420142167 is a prime.

It is a super-2 number, since 2×22420142231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22420142197 and 22420142206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420144231) 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, 88268150 + ... + 88268403.

It is an arithmetic number, because the mean of its divisors is an integer number (5649169728).

Almost surely, 2^22420142231 is an apocalyptic number.

22420142231 is a deficient number, since it is larger than the sum of its proper divisors (176536681).

22420142231 is a wasteful number, since it uses less digits than its factorization.

22420142231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176536680.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 22420142231 its reverse (13224102422), we get a palindrome (35644244653).

The spelling of 22420142231 in words is "twenty-two billion, four hundred twenty million, one hundred forty-two thousand, two hundred thirty-one".