30142221 has 8 divisors (see below), whose sum is σ = 40565664. Its totient is φ = 19906800.

The previous prime is 30142201. The next prime is 30142237. The reversal of 30142221 is 12224103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30142221 - 2⁶ = 30142157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30142221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30142201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46630 + ... + 47271.

It is an arithmetic number, because the mean of its divisors is an integer number (5070708).

Almost surely, 2^30142221 is an apocalyptic number.

It is an amenable number.

30142221 is a deficient number, since it is larger than the sum of its proper divisors (10423443).

30142221 is a wasteful number, since it uses less digits than its factorization.

30142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94011.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 30142221 is about 5490.1931660006. The cubic root of 30142221 is about 311.2134919519.

Adding to 30142221 its reverse (12224103), we get a palindrome (42366324).

The spelling of 30142221 in words is "thirty million, one hundred forty-two thousand, two hundred twenty-one".