30431220320 has 48 divisors (see below), whose sum is σ = 71943990048. Its totient is φ = 12163983360.

The previous prime is 30431220301. The next prime is 30431220329. The reversal of 30431220320 is 2302213403.

It is a super-3 number, since 3×30431220320³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30431220292 and 30431220301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30431220329) 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, 165800 + ... + 297240.

It is an arithmetic number, because the mean of its divisors is an integer number (1498833126).

Almost surely, 2^30431220320 is an apocalyptic number.

It is an amenable number.

30431220320 is an abundant number, since it is smaller than the sum of its proper divisors (41512769728).

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

30431220320 is a wasteful number, since it uses less digits than its factorization.

30431220320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132903 (or 132895 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 30431220320 its reverse (2302213403), we get a palindrome (32733433723).

The spelling of 30431220320 in words is "thirty billion, four hundred thirty-one million, two hundred twenty thousand, three hundred twenty".