30031100 has 72 divisors (see below), whose sum is σ = 74245248. Its totient is φ = 10436800.

The previous prime is 30031063. The next prime is 30031201. The reversal of 30031100 is 113003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24707 + ... + 25893.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^30031100 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 30031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37122624).

30031100 is an abundant number, since it is smaller than the sum of its proper divisors (44214148).

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

30031100 is a wasteful number, since it uses less digits than its factorization.

30031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 8.

The square root of 30031100 is about 5480.0638682410. The cubic root of 30031100 is about 310.8305856592.

Adding to 30031100 its reverse (113003), we get a palindrome (30144103).

The spelling of 30031100 in words is "thirty million, thirty-one thousand, one hundred".