253346221 has 2 divisors, whose sum is σ = 253346222. Its totient is φ = 253346220.

The previous prime is 253346183. The next prime is 253346227. The reversal of 253346221 is 122643352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221592996 + 31753225 = 14886^2 + 5635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253346221 is a prime.

It is equal to p_13852306 and since 253346221 and 13852306 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253346221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253346227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126673110 + 126673111.

It is an arithmetic number, because the mean of its divisors is an integer number (126673111).

Almost surely, 2^253346221 is an apocalyptic number.

It is an amenable number.

253346221 is a deficient number, since it is larger than the sum of its proper divisors (1).

253346221 is an equidigital number, since it uses as much as digits as its factorization.

253346221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 253346221 is about 15916.8533636520. The cubic root of 253346221 is about 632.7587268164.

Adding to 253346221 its reverse (122643352), we get a palindrome (375989573).

The spelling of 253346221 in words is "two hundred fifty-three million, three hundred forty-six thousand, two hundred twenty-one".