53309261 has 2 divisors, whose sum is σ = 53309262. Its totient is φ = 53309260.

The previous prime is 53309257. The next prime is 53309281. The reversal of 53309261 is 16290335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28249225 + 25060036 = 5315^2 + 5006^2 .

It is a cyclic number.

It is not a de Polignac number, because 53309261 - 2² = 53309257 is a prime.

It is a super-2 number, since 2×53309261² = 5683754616732242, which contains 22 as substring.

It is equal to p_3187505 and since 53309261 and 3187505 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53309281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26654630 + 26654631.

It is an arithmetic number, because the mean of its divisors is an integer number (26654631).

Almost surely, 2^53309261 is an apocalyptic number.

It is an amenable number.

53309261 is a deficient number, since it is larger than the sum of its proper divisors (1).

53309261 is an equidigital number, since it uses as much as digits as its factorization.

53309261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 53309261 is about 7301.3191273906. The cubic root of 53309261 is about 376.3577706974.

Adding to 53309261 its reverse (16290335), we get a palindrome (69599596).

The spelling of 53309261 in words is "fifty-three million, three hundred nine thousand, two hundred sixty-one".