30231031220 has 24 divisors (see below), whose sum is σ = 68368640424. Its totient is φ = 11162226816.

The previous prime is 30231031219. The next prime is 30231031253. The reversal of 30231031220 is 2213013203.

It can be written as a sum of positive squares in 4 ways, for example, as 1806420004 + 28424611216 = 42502^2 + 168596^2 .

It is a super-2 number, since 2×30231031220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 58136339 + ... + 58136858.

It is an arithmetic number, because the mean of its divisors is an integer number (2848693351).

Almost surely, 2^30231031220 is an apocalyptic number.

It is an amenable number.

30231031220 is an abundant number, since it is smaller than the sum of its proper divisors (38137609204).

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

30231031220 is a wasteful number, since it uses less digits than its factorization.

30231031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116273219 (or 116273217 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30231031220 its reverse (2213013203), we get a palindrome (32444044423).

The spelling of 30231031220 in words is "thirty billion, two hundred thirty-one million, thirty-one thousand, two hundred twenty".