53509331 has 2 divisors, whose sum is σ = 53509332. Its totient is φ = 53509330.

The previous prime is 53509279. The next prime is 53509343. The reversal of 53509331 is 13390535.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53509331 - 2¹⁰ = 53508307 is a prime.

It is a super-2 number, since 2×53509331² = 5726497008135122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 53509294 and 53509303.

It is not a weakly prime, because it can be changed into another prime (53509361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26754665 + 26754666.

It is an arithmetic number, because the mean of its divisors is an integer number (26754666).

Almost surely, 2^53509331 is an apocalyptic number.

53509331 is a deficient number, since it is larger than the sum of its proper divisors (1).

53509331 is an equidigital number, since it uses as much as digits as its factorization.

53509331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6075, while the sum is 29.

The square root of 53509331 is about 7315.0072453826. The cubic root of 53509331 is about 376.8280072995.

Adding to 53509331 its reverse (13390535), we get a palindrome (66899866).

The spelling of 53509331 in words is "fifty-three million, five hundred nine thousand, three hundred thirty-one".