53173531 has 2 divisors, whose sum is σ = 53173532. Its totient is φ = 53173530.

The previous prime is 53173513. The next prime is 53173537. The reversal of 53173531 is 13537135.

Together with previous prime (53173513) 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 53173531 - 2¹¹ = 53171483 is a prime.

It is a super-2 number, since 2×53173531² = 5654848798015922, 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 53173531.

It is not a weakly prime, because it can be changed into another prime (53173537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26586765 + 26586766.

It is an arithmetic number, because the mean of its divisors is an integer number (26586766).

Almost surely, 2^53173531 is an apocalyptic number.

53173531 is a deficient number, since it is larger than the sum of its proper divisors (1).

53173531 is an equidigital number, since it uses as much as digits as its factorization.

53173531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 53173531 is about 7292.0183077115. The cubic root of 53173531 is about 376.0380860583.

The spelling of 53173531 in words is "fifty-three million, one hundred seventy-three thousand, five hundred thirty-one".