22231501242420 has 192 divisors, whose sum is σ = 66546609744384. Its totient is φ = 5531694981120.

The previous prime is 22231501242409. The next prime is 22231501242449. The reversal of 22231501242420 is 2424210513222.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 655914994 + ... + 655948886.

It is an arithmetic number, because the mean of its divisors is an integer number (346596925752).

Almost surely, 2^{22231501242420} is an apocalyptic number.

22231501242420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22231501242420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33273304872192).

22231501242420 is an abundant number, since it is smaller than the sum of its proper divisors (44315108501964).

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

22231501242420 is a wasteful number, since it uses less digits than its factorization.

22231501242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45562 (or 45560 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 22231501242420 its reverse (2424210513222), we get a palindrome (24655711755642).

The spelling of 22231501242420 in words is "twenty-two trillion, two hundred thirty-one billion, five hundred one million, two hundred forty-two thousand, four hundred twenty".