30421481 has 2 divisors, whose sum is σ = 30421482. Its totient is φ = 30421480.

The previous prime is 30421477. The next prime is 30421487. The reversal of 30421481 is 18412403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30151081 + 270400 = 5491^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 30421481 - 2² = 30421477 is a prime.

It is a super-2 number, since 2×30421481² = 1850933012466722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30421487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210740 + 15210741.

It is an arithmetic number, because the mean of its divisors is an integer number (15210741).

Almost surely, 2^30421481 is an apocalyptic number.

It is an amenable number.

30421481 is a deficient number, since it is larger than the sum of its proper divisors (1).

30421481 is an equidigital number, since it uses as much as digits as its factorization.

30421481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 30421481 is about 5515.5671512547. The cubic root of 30421481 is about 312.1716435834.

Adding to 30421481 its reverse (18412403), we get a palindrome (48833884).

The spelling of 30421481 in words is "thirty million, four hundred twenty-one thousand, four hundred eighty-one".