53243251 has 2 divisors, whose sum is σ = 53243252. Its totient is φ = 53243250.

The previous prime is 53243249. The next prime is 53243279. The reversal of 53243251 is 15234235.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53243251 - 2¹ = 53243249 is a prime.

Together with 53243249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53243651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26621625 + 26621626.

It is an arithmetic number, because the mean of its divisors is an integer number (26621626).

Almost surely, 2^53243251 is an apocalyptic number.

53243251 is a deficient number, since it is larger than the sum of its proper divisors (1).

53243251 is an equidigital number, since it uses as much as digits as its factorization.

53243251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 25.

The square root of 53243251 is about 7296.7973111496. The cubic root of 53243251 is about 376.2023653194.

Adding to 53243251 its reverse (15234235), we get a palindrome (68477486).

The spelling of 53243251 in words is "fifty-three million, two hundred forty-three thousand, two hundred fifty-one".