22131005240 has 32 divisors (see below), whose sum is σ = 49910333760. Its totient is φ = 8831856000.

The previous prime is 22131005203. The next prime is 22131005251. The reversal of 22131005240 is 4250013122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624611 + ... + 659090.

It is an arithmetic number, because the mean of its divisors is an integer number (1559697930).

Almost surely, 2^22131005240 is an apocalyptic number.

22131005240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22131005240 is an abundant number, since it is smaller than the sum of its proper divisors (27779328520).

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

22131005240 is a wasteful number, since it uses less digits than its factorization.

22131005240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284143 (or 1284139 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 22131005240 its reverse (4250013122), we get a palindrome (26381018362).

The spelling of 22131005240 in words is "twenty-two billion, one hundred thirty-one million, five thousand, two hundred forty".