30342221 has 48 divisors (see below), whose sum is σ = 42134400. Its totient is φ = 21555072.

The previous prime is 30342203. The next prime is 30342233. The reversal of 30342221 is 12224303.

It is not a de Polignac number, because 30342221 - 2⁶ = 30342157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30342221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30342251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 278315 + ... + 278423.

It is an arithmetic number, because the mean of its divisors is an integer number (877800).

Almost surely, 2^30342221 is an apocalyptic number.

It is an amenable number.

30342221 is a deficient number, since it is larger than the sum of its proper divisors (11792179).

30342221 is a wasteful number, since it uses less digits than its factorization.

30342221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30342221 is about 5508.3773472775. The cubic root of 30342221 is about 311.9002975585.

Adding to 30342221 its reverse (12224303), we get a palindrome (42566524).

It can be divided in two parts, 303 and 42221, that added together give a palindrome (42524).

The spelling of 30342221 in words is "thirty million, three hundred forty-two thousand, two hundred twenty-one".