30422257 has 2 divisors, whose sum is σ = 30422258. Its totient is φ = 30422256.

The previous prime is 30422243. The next prime is 30422263. The reversal of 30422257 is 75222403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22810176 + 7612081 = 4776^2 + 2759^2 .

It is an emirp because it is prime and its reverse (75222403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30422257 - 2¹¹ = 30420209 is a prime.

It is not a weakly prime, because it can be changed into another prime (30422237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15211128 + 15211129.

It is an arithmetic number, because the mean of its divisors is an integer number (15211129).

Almost surely, 2^30422257 is an apocalyptic number.

It is an amenable number.

30422257 is a deficient number, since it is larger than the sum of its proper divisors (1).

30422257 is an equidigital number, since it uses as much as digits as its factorization.

30422257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 30422257 is about 5515.6374971530. The cubic root of 30422257 is about 312.1742978826.

The spelling of 30422257 in words is "thirty million, four hundred twenty-two thousand, two hundred fifty-seven".