30000221750 has 16 divisors (see below), whose sum is σ = 56160415584. Its totient is φ = 12000088600.

The previous prime is 30000221743. The next prime is 30000221791. The reversal of 30000221750 is 5712200003.

It is a super-4 number, since 4×30000221750⁴ (a number of 43 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60000194 + ... + 60000693.

It is an arithmetic number, because the mean of its divisors is an integer number (3510025974).

Almost surely, 2^30000221750 is an apocalyptic number.

30000221750 is a deficient number, since it is larger than the sum of its proper divisors (26160193834).

30000221750 is a wasteful number, since it uses less digits than its factorization.

30000221750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120000904 (or 120000894 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

Adding to 30000221750 its reverse (5712200003), we get a palindrome (35712421753).

The spelling of 30000221750 in words is "thirty billion, two hundred twenty-one thousand, seven hundred fifty".