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30643213 is a prime number
BaseRepresentation
bin111010011100…
…1010000001101
32010122211120211
41310321100031
530321040323
63012442421
7521314546
oct164712015
963584524
1030643213
111632a777
12a319411
13646b9a3
1440d94cd
152a5470d
hex1d3940d

30643213 has 2 divisors, whose sum is σ = 30643214. Its totient is φ = 30643212.

The previous prime is 30643157. The next prime is 30643241. The reversal of 30643213 is 31234603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28323684 + 2319529 = 5322^2 + 1523^2 .

It is a cyclic number.

It is not a de Polignac number, because 30643213 - 29 = 30642701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30643313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15321606 + 15321607.

It is an arithmetic number, because the mean of its divisors is an integer number (15321607).

Almost surely, 230643213 is an apocalyptic number.

It is an amenable number.

30643213 is a deficient number, since it is larger than the sum of its proper divisors (1).

30643213 is an equidigital number, since it uses as much as digits as its factorization.

30643213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 30643213 is about 5535.6312196533. The cubic root of 30643213 is about 312.9282465742.

Adding to 30643213 its reverse (31234603), we get a palindrome (61877816).

The spelling of 30643213 in words is "thirty million, six hundred forty-three thousand, two hundred thirteen".