22221540321530 has 64 divisors (see below), whose sum is σ = 44706413566080. Its totient is φ = 7882217548800.

The previous prime is 22221540321521. The next prime is 22221540321551. The reversal of 22221540321530 is 3512304512222.

It is a super-2 number, since 2×22221540321530² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28154537 + ... + 28933043.

It is an arithmetic number, because the mean of its divisors is an integer number (698537711970).

Almost surely, 2^{22221540321530} is an apocalyptic number.

22221540321530 is an abundant number, since it is smaller than the sum of its proper divisors (22484873244550).

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

22221540321530 is a wasteful number, since it uses less digits than its factorization.

22221540321530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784895.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 22221540321530 its reverse (3512304512222), we get a palindrome (25733844833752).

The spelling of 22221540321530 in words is "twenty-two trillion, two hundred twenty-one billion, five hundred forty million, three hundred twenty-one thousand, five hundred thirty".