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21313301 is a prime number
BaseRepresentation
bin101000101001…
…1011100010101
31111002211100112
41101103130111
520424011201
62040452405
7346105622
oct121233425
944084315
1021313301
1111037aa9
12717a105
134553129
142b8b349
151d100bb
hex1453715

21313301 has 2 divisors, whose sum is σ = 21313302. Its totient is φ = 21313300.

The previous prime is 21313297. The next prime is 21313333. The reversal of 21313301 is 10331312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 2172676 = 4375^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313301 - 22 = 21313297 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656650 + 10656651.

It is an arithmetic number, because the mean of its divisors is an integer number (10656651).

Almost surely, 221313301 is an apocalyptic number.

It is an amenable number.

21313301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313301 is an equidigital number, since it uses as much as digits as its factorization.

21313301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 21313301 is about 4616.6330805036. The cubic root of 21313301 is about 277.2576722780.

Adding to 21313301 its reverse (10331312), we get a palindrome (31644613).

The spelling of 21313301 in words is "twenty-one million, three hundred thirteen thousand, three hundred one".