30221369 has 2 divisors, whose sum is σ = 30221370. Its totient is φ = 30221368.

The previous prime is 30221351. The next prime is 30221431. The reversal of 30221369 is 96312203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30030400 + 190969 = 5480^2 + 437^2 .

It is a cyclic number.

It is not a de Polignac number, because 30221369 - 2¹² = 30217273 is a prime.

It is a super-2 number, since 2×30221369² = 1826662288468322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30221069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110684 + 15110685.

It is an arithmetic number, because the mean of its divisors is an integer number (15110685).

Almost surely, 2^30221369 is an apocalyptic number.

It is an amenable number.

30221369 is a deficient number, since it is larger than the sum of its proper divisors (1).

30221369 is an equidigital number, since it uses as much as digits as its factorization.

30221369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 30221369 is about 5497.3965656481. The cubic root of 30221369 is about 311.4856505873.

The spelling of 30221369 in words is "thirty million, two hundred twenty-one thousand, three hundred sixty-nine".