30710421 has 20 divisors (see below), whose sum is σ = 52430752. Its totient is φ = 17548488.

The previous prime is 30710413. The next prime is 30710431. The reversal of 30710421 is 12401703.

It is not a de Polignac number, because 30710421 - 2³ = 30710413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30710394 and 30710403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30710401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26515 + ... + 27648.

Almost surely, 2^30710421 is an apocalyptic number.

It is an amenable number.

30710421 is a deficient number, since it is larger than the sum of its proper divisors (21720331).

30710421 is an equidigital number, since it uses as much as digits as its factorization.

30710421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54182 (or 54173 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 30710421 is about 5541.6983858741. The cubic root of 30710421 is about 313.1568553772.

The spelling of 30710421 in words is "thirty million, seven hundred ten thousand, four hundred twenty-one".