53253509 has 2 divisors, whose sum is σ = 53253510. Its totient is φ = 53253508.

The previous prime is 53253493. The next prime is 53253511. The reversal of 53253509 is 90535235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37173409 + 16080100 = 6097^2 + 4010^2 .

It is a cyclic number.

It is not a de Polignac number, because 53253509 - 2⁴ = 53253493 is a prime.

Together with 53253511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53253539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26626754 + 26626755.

It is an arithmetic number, because the mean of its divisors is an integer number (26626755).

Almost surely, 2^53253509 is an apocalyptic number.

It is an amenable number.

53253509 is a deficient number, since it is larger than the sum of its proper divisors (1).

53253509 is an equidigital number, since it uses as much as digits as its factorization.

53253509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 32.

The square root of 53253509 is about 7297.5001884207. The cubic root of 53253509 is about 376.2265238495.

The spelling of 53253509 in words is "fifty-three million, two hundred fifty-three thousand, five hundred nine".