53171018 has 4 divisors (see below), whose sum is σ = 79756530. Its totient is φ = 26585508.

The previous prime is 53171017. The next prime is 53171021. The reversal of 53171018 is 81017135.

53171018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81017135 = 5 ⋅16203427.

It can be written as a sum of positive squares in only one way, i.e., 48344209 + 4826809 = 6953^2 + 2197^2 .

It is not an unprimeable number, because it can be changed into a prime (53171011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13292753 + ... + 13292756.

Almost surely, 2^53171018 is an apocalyptic number.

53171018 is a deficient number, since it is larger than the sum of its proper divisors (26585512).

53171018 is a wasteful number, since it uses less digits than its factorization.

53171018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26585511.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 53171018 is about 7291.8459939853. The cubic root of 53171018 is about 376.0321620670.

The spelling of 53171018 in words is "fifty-three million, one hundred seventy-one thousand, eighteen".