22312223442 has 64 divisors (see below), whose sum is σ = 50960918400. Its totient is φ = 7230980160.

The previous prime is 22312223413. The next prime is 22312223449. The reversal of 22312223442 is 24432221322.

22312223442 is a `hidden beast` number, since 2 + 2 + 312 + 2 + 2 + 344 + 2 = 666.

It is a super-3 number, since 3×22312223442³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22312223449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3331317 + ... + 3338007.

It is an arithmetic number, because the mean of its divisors is an integer number (796264350).

Almost surely, 2^22312223442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22312223442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25480459200).

22312223442 is an abundant number, since it is smaller than the sum of its proper divisors (28648694958).

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

22312223442 is a wasteful number, since it uses less digits than its factorization.

22312223442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408 (or 8402 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

Adding to 22312223442 its reverse (24432221322), we get a palindrome (46744444764).

The spelling of 22312223442 in words is "twenty-two billion, three hundred twelve million, two hundred twenty-three thousand, four hundred forty-two".