30516481 has 2 divisors, whose sum is σ = 30516482. Its totient is φ = 30516480.

The previous prime is 30516461. The next prime is 30516487. The reversal of 30516481 is 18461503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 442225 = 5484^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 30516481 - 2¹¹ = 30514433 is a prime.

It is a super-2 number, since 2×30516481² = 1862511225246722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30516487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15258240 + 15258241.

It is an arithmetic number, because the mean of its divisors is an integer number (15258241).

Almost surely, 2^30516481 is an apocalyptic number.

It is an amenable number.

30516481 is a deficient number, since it is larger than the sum of its proper divisors (1).

30516481 is an equidigital number, since it uses as much as digits as its factorization.

30516481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 30516481 is about 5524.1724267079. The cubic root of 30516481 is about 312.4962551018.

Adding to 30516481 its reverse (18461503), we get a palindrome (48977984).

The spelling of 30516481 in words is "thirty million, five hundred sixteen thousand, four hundred eighty-one".