22311205540 has 24 divisors (see below), whose sum is σ = 50457650040. Its totient is φ = 8237983488.

The previous prime is 22311205529. The next prime is 22311205559. The reversal of 22311205540 is 4550211322.

It can be written as a sum of positive squares in 4 ways, for example, as 2479243264 + 19831962276 = 49792^2 + 140826^2 .

It is a super-3 number, since 3×22311205540³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42905905 + ... + 42906424.

It is an arithmetic number, because the mean of its divisors is an integer number (2102402085).

Almost surely, 2^22311205540 is an apocalyptic number.

22311205540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22311205540 is an abundant number, since it is smaller than the sum of its proper divisors (28146444500).

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

22311205540 is a wasteful number, since it uses less digits than its factorization.

22311205540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85812351 (or 85812349 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 22311205540 its reverse (4550211322), we get a palindrome (26861416862).

The spelling of 22311205540 in words is "twenty-two billion, three hundred eleven million, two hundred five thousand, five hundred forty".