30111205530 has 32 divisors (see below), whose sum is σ = 82590735744. Its totient is φ = 6882561216.

The previous prime is 30111205517. The next prime is 30111205549. The reversal of 30111205530 is 3550211103.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30111205497 and 30111205506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71693137 + ... + 71693556.

It is an arithmetic number, because the mean of its divisors is an integer number (2580960492).

Almost surely, 2^30111205530 is an apocalyptic number.

30111205530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30111205530 is an abundant number, since it is smaller than the sum of its proper divisors (52479530214).

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

30111205530 is a wasteful number, since it uses less digits than its factorization.

30111205530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143386710.

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 30111205530 its reverse (3550211103), we get a palindrome (33661416633).

It can be divided in two parts, 30111 and 205530, that added together give a triangular number (235641 = T₆₈₆).

The spelling of 30111205530 in words is "thirty billion, one hundred eleven million, two hundred five thousand, five hundred thirty".