30221441 has 2 divisors, whose sum is σ = 30221442. Its totient is φ = 30221440.

The previous prime is 30221431. The next prime is 30221447. The reversal of 30221441 is 14412203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29866225 + 355216 = 5465^2 + 596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30221441 is a prime.

It is a super-2 number, since 2×30221441² = 1826670992232962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30221447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110720 + 15110721.

It is an arithmetic number, because the mean of its divisors is an integer number (15110721).

Almost surely, 2^30221441 is an apocalyptic number.

It is an amenable number.

30221441 is a deficient number, since it is larger than the sum of its proper divisors (1).

30221441 is an equidigital number, since it uses as much as digits as its factorization.

30221441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 30221441 is about 5497.4031141986. The cubic root of 30221441 is about 311.4858979503.

Adding to 30221441 its reverse (14412203), we get a palindrome (44633644).

The spelling of 30221441 in words is "thirty million, two hundred twenty-one thousand, four hundred forty-one".