65220229 has 2 divisors, whose sum is σ = 65220230. Its totient is φ = 65220228.

The previous prime is 65220227. The next prime is 65220241. The reversal of 65220229 is 92202256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62964225 + 2256004 = 7935^2 + 1502^2 .

It is a cyclic number.

It is not a de Polignac number, because 65220229 - 2¹ = 65220227 is a prime.

Together with 65220227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 65220197 and 65220206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65220227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32610114 + 32610115.

It is an arithmetic number, because the mean of its divisors is an integer number (32610115).

Almost surely, 2^65220229 is an apocalyptic number.

It is an amenable number.

65220229 is a deficient number, since it is larger than the sum of its proper divisors (1).

65220229 is an equidigital number, since it uses as much as digits as its factorization.

65220229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 65220229 is about 8075.9042218194. The cubic root of 65220229 is about 402.5261564988.

The spelling of 65220229 in words is "sixty-five million, two hundred twenty thousand, two hundred twenty-nine".