30135222 has 48 divisors (see below), whose sum is σ = 71154720. Its totient is φ = 9161856.

The previous prime is 30135211. The next prime is 30135227. The reversal of 30135222 is 22253103.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30135195 and 30135204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30135227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20103 + ... + 21549.

It is an arithmetic number, because the mean of its divisors is an integer number (1482390).

Almost surely, 2^30135222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30135222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35577360).

30135222 is an abundant number, since it is smaller than the sum of its proper divisors (41019498).

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

30135222 is a wasteful number, since it uses less digits than its factorization.

30135222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30135222 is about 5489.5557197281. Note that the first 3 decimals coincide. The cubic root of 30135222 is about 311.1894022446.

Adding to 30135222 its reverse (22253103), we get a palindrome (52388325).

The spelling of 30135222 in words is "thirty million, one hundred thirty-five thousand, two hundred twenty-two".