22131331002 has 48 divisors (see below), whose sum is σ = 54058179840. Its totient is φ = 6706461960.

The previous prime is 22131330959. The next prime is 22131331003. The reversal of 22131331002 is 20013313122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22131331003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1687018 + ... + 1700085.

It is an arithmetic number, because the mean of its divisors is an integer number (1126212080).

Almost surely, 2^22131331002 is an apocalyptic number.

22131331002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22131331002 is an abundant number, since it is smaller than the sum of its proper divisors (31926848838).

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

22131331002 is a wasteful number, since it uses less digits than its factorization.

22131331002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387136 (or 3387119 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 22131331002 its reverse (20013313122), we get a palindrome (42144644124).

The spelling of 22131331002 in words is "twenty-two billion, one hundred thirty-one million, three hundred thirty-one thousand, two".