30105500 has 48 divisors (see below), whose sum is σ = 69232800. Its totient is φ = 11404800.

The previous prime is 30105499. The next prime is 30105529. The reversal of 30105500 is 550103.

It is a super-2 number, since 2×30105500² = 1812682260500000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7916 + ... + 11084.

It is an arithmetic number, because the mean of its divisors is an integer number (1442350).

Almost surely, 2^30105500 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 30105500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34616400).

30105500 is an abundant number, since it is smaller than the sum of its proper divisors (39127300).

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

30105500 is a wasteful number, since it uses less digits than its factorization.

30105500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207 (or 3195 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 30105500 is about 5486.8479111417. The cubic root of 30105500 is about 311.0870611606.

Adding to 30105500 its reverse (550103), we get a palindrome (30655603).

The spelling of 30105500 in words is "thirty million, one hundred five thousand, five hundred".