30040221 has 8 divisors (see below), whose sum is σ = 40466944. Its totient is φ = 19820160.

The previous prime is 30040217. The next prime is 30040229. The reversal of 30040221 is 12204003.

30040221 = 293² + 294² + ... + 486².

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

It is not a de Polignac number, because 30040221 - 2² = 30040217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30040197 and 30040206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040229) 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, 51325 + ... + 51906.

It is an arithmetic number, because the mean of its divisors is an integer number (5058368).

Almost surely, 2^30040221 is an apocalyptic number.

It is an amenable number.

30040221 is a deficient number, since it is larger than the sum of its proper divisors (10426723).

30040221 is a wasteful number, since it uses less digits than its factorization.

30040221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103331.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 30040221 is about 5480.8960033921. The cubic root of 30040221 is about 310.8620508047.

Adding to 30040221 its reverse (12204003), we get a palindrome (42244224).

The spelling of 30040221 in words is "thirty million, forty thousand, two hundred twenty-one".