30522281 has 2 divisors, whose sum is σ = 30522282. Its totient is φ = 30522280.

The previous prime is 30522263. The next prime is 30522287. The reversal of 30522281 is 18222503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 11162281 = 4400^2 + 3341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30522281 is a prime.

It is a super-2 number, since 2×30522281² = 1863219274885922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30522287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15261140 + 15261141.

It is an arithmetic number, because the mean of its divisors is an integer number (15261141).

Almost surely, 2^30522281 is an apocalyptic number.

It is an amenable number.

30522281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30522281 is an equidigital number, since it uses as much as digits as its factorization.

30522281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 30522281 is about 5524.6973672772. The cubic root of 30522281 is about 312.5160516555.

Adding to 30522281 its reverse (18222503), we get a palindrome (48744784).

It can be divided in two parts, 30522 and 281, that added together give a palindrome (30803).

The spelling of 30522281 in words is "thirty million, five hundred twenty-two thousand, two hundred eighty-one".