30521461 has 2 divisors, whose sum is σ = 30521462. Its totient is φ = 30521460.

The previous prime is 30521459. The next prime is 30521473. The reversal of 30521461 is 16412503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 12117361 = 4290^2 + 3481^2 .

It is a cyclic number.

It is not a de Polignac number, because 30521461 - 2¹ = 30521459 is a prime.

Together with 30521459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30521761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15260730 + 15260731.

It is an arithmetic number, because the mean of its divisors is an integer number (15260731).

Almost surely, 2^30521461 is an apocalyptic number.

It is an amenable number.

30521461 is a deficient number, since it is larger than the sum of its proper divisors (1).

30521461 is an equidigital number, since it uses as much as digits as its factorization.

30521461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30521461 is about 5524.6231545690. The cubic root of 30521461 is about 312.5132529846.

Adding to 30521461 its reverse (16412503), we get a palindrome (46933964).

The spelling of 30521461 in words is "thirty million, five hundred twenty-one thousand, four hundred sixty-one".