53163581 has 2 divisors, whose sum is σ = 53163582. Its totient is φ = 53163580.

The previous prime is 53163559. The next prime is 53163613. The reversal of 53163581 is 18536135.

It is an a-pointer prime, because the next prime (53163613) can be obtained adding 53163581 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53158681 + 4900 = 7291^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 53163581 - 2¹⁴ = 53147197 is a prime.

It is a super-2 number, since 2×53163581² = 5652732689487122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53163541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26581790 + 26581791.

It is an arithmetic number, because the mean of its divisors is an integer number (26581791).

Almost surely, 2^53163581 is an apocalyptic number.

It is an amenable number.

53163581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53163581 is an equidigital number, since it uses as much as digits as its factorization.

53163581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 53163581 is about 7291.3360229796. The cubic root of 53163581 is about 376.0146294481.

The spelling of 53163581 in words is "fifty-three million, one hundred sixty-three thousand, five hundred eighty-one".