30202421 has 8 divisors (see below), whose sum is σ = 32583384. Its totient is φ = 27888640.

The previous prime is 30202409. The next prime is 30202439. The reversal of 30202421 is 12420203.

It can be written as a sum of positive squares in 4 ways, for example, as 7980625 + 22221796 = 2825^2 + 4714^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 30202421 - 2⁶ = 30202357 is a prime.

It is a super-2 number, since 2×30202421² = 1824372468522482, which contains 22 as substring.

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 = 30202396 and 30202405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30202441) 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, 15860 + ... + 17661.

It is an arithmetic number, because the mean of its divisors is an integer number (4072923).

Almost surely, 2^30202421 is an apocalyptic number.

It is an amenable number.

30202421 is a deficient number, since it is larger than the sum of its proper divisors (2380963).

30202421 is a wasteful number, since it uses less digits than its factorization.

30202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33591.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 30202421 is about 5495.6729342274. The cubic root of 30202421 is about 311.4205392195.

Adding to 30202421 its reverse (12420203), we get a palindrome (42622624).

The spelling of 30202421 in words is "thirty million, two hundred two thousand, four hundred twenty-one".