30531022144 has 56 divisors (see below), whose sum is σ = 69324362240. Its totient is φ = 13068781056.

The previous prime is 30531022141. The next prime is 30531022169. The reversal of 30531022144 is 44122013503.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30531022141) by changing a digit.

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, 330289 + ... + 412495.

It is an arithmetic number, because the mean of its divisors is an integer number (1237935040).

Almost surely, 2^30531022144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30531022144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34662181120).

30531022144 is an abundant number, since it is smaller than the sum of its proper divisors (38793340096).

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

30531022144 is an equidigital number, since it uses as much as digits as its factorization.

30531022144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83055 (or 83045 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 30531022144 its reverse (44122013503), we get a palindrome (74653035647).

The spelling of 30531022144 in words is "thirty billion, five hundred thirty-one million, twenty-two thousand, one hundred forty-four".