22231223221530 has 32 divisors (see below), whose sum is σ = 53997766288704. Its totient is φ = 5856900574976.

The previous prime is 22231223221523. The next prime is 22231223221541. The reversal of 22231223221530 is 3512232213222.

It is a happy number.

It is a super-2 number, since 2×22231223221530² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4464098559 + ... + 4464103538.

It is an arithmetic number, because the mean of its divisors is an integer number (1687430196522).

Almost surely, 2^{22231223221530} is an apocalyptic number.

22231223221530 is an abundant number, since it is smaller than the sum of its proper divisors (31766543067174).

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

22231223221530 is a wasteful number, since it uses less digits than its factorization.

22231223221530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928202190.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 22231223221530 its reverse (3512232213222), we get a palindrome (25743455434752).

The spelling of 22231223221530 in words is "twenty-two trillion, two hundred thirty-one billion, two hundred twenty-three million, two hundred twenty-one thousand, five hundred thirty".