53317531 has 2 divisors, whose sum is σ = 53317532. Its totient is φ = 53317530.

The previous prime is 53317513. The next prime is 53317543. The reversal of 53317531 is 13571335.

Together with previous prime (53317513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53317531 - 2⁵ = 53317499 is a prime.

It is a super-2 number, since 2×53317531² = 5685518223871922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53317531.

It is not a weakly prime, because it can be changed into another prime (53317501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26658765 + 26658766.

It is an arithmetic number, because the mean of its divisors is an integer number (26658766).

Almost surely, 2^53317531 is an apocalyptic number.

53317531 is a deficient number, since it is larger than the sum of its proper divisors (1).

53317531 is an equidigital number, since it uses as much as digits as its factorization.

53317531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4725, while the sum is 28.

The square root of 53317531 is about 7301.8854414459. The cubic root of 53317531 is about 376.3772314676.

Adding to 53317531 its reverse (13571335), we get a palindrome (66888866).

The spelling of 53317531 in words is "fifty-three million, three hundred seventeen thousand, five hundred thirty-one".