30477221 has 2 divisors, whose sum is σ = 30477222. Its totient is φ = 30477220.

The previous prime is 30477193. The next prime is 30477257. The reversal of 30477221 is 12277403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30129121 + 348100 = 5489^2 + 590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30477221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30477721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15238610 + 15238611.

It is an arithmetic number, because the mean of its divisors is an integer number (15238611).

Almost surely, 2^30477221 is an apocalyptic number.

It is an amenable number.

30477221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30477221 is an equidigital number, since it uses as much as digits as its factorization.

30477221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 30477221 is about 5520.6178096296. The cubic root of 30477221 is about 312.3621869131.

The spelling of 30477221 in words is "thirty million, four hundred seventy-seven thousand, two hundred twenty-one".