253333261 has 2 divisors, whose sum is σ = 253333262. Its totient is φ = 253333260.

The previous prime is 253333259. The next prime is 253333279. The reversal of 253333261 is 162333352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252619236 + 714025 = 15894^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 253333261 - 2¹ = 253333259 is a prime.

It is a super-2 number, since 2×253333261² = 128355482257788242, which contains 22 as substring.

Together with 253333259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253333361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126666630 + 126666631.

It is an arithmetic number, because the mean of its divisors is an integer number (126666631).

Almost surely, 2^253333261 is an apocalyptic number.

It is an amenable number.

253333261 is a deficient number, since it is larger than the sum of its proper divisors (1).

253333261 is an equidigital number, since it uses as much as digits as its factorization.

253333261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 28.

The square root of 253333261 is about 15916.4462428018. The cubic root of 253333261 is about 632.7479369799.

Subtracting from 253333261 its reverse (162333352), we obtain a palindrome (90999909).

The spelling of 253333261 in words is "two hundred fifty-three million, three hundred thirty-three thousand, two hundred sixty-one".