30321431000 has 128 divisors (see below), whose sum is σ = 81499392000. Its totient is φ = 10343203200.

The previous prime is 30321430961. The next prime is 30321431003. The reversal of 30321431000 is 13412303.

It is a happy number.

It is a super-2 number, since 2×30321431000² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30321431000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321431003) 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 31 ways as a sum of consecutive naturals, for example, 1382117 + ... + 1403883.

It is an arithmetic number, because the mean of its divisors is an integer number (636714000).

Almost surely, 2^30321431000 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 30321431000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40749696000).

30321431000 is an abundant number, since it is smaller than the sum of its proper divisors (51177961000).

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

30321431000 is a wasteful number, since it uses less digits than its factorization.

30321431000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21994 (or 21980 counting only the distinct ones).

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

Adding to 30321431000 its reverse (13412303), we get a palindrome (30334843303).

The spelling of 30321431000 in words is "thirty billion, three hundred twenty-one million, four hundred thirty-one thousand".