53171644 has 12 divisors (see below), whose sum is σ = 93226168. Its totient is φ = 26535600.

The previous prime is 53171641. The next prime is 53171647. The reversal of 53171644 is 44617135.

It is an interprime number because it is at equal distance from previous prime (53171641) and next prime (53171647).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53171641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10122 + ... + 14449.

Almost surely, 2^53171644 is an apocalyptic number.

It is an amenable number.

53171644 is a deficient number, since it is larger than the sum of its proper divisors (40054524).

53171644 is a wasteful number, since it uses less digits than its factorization.

53171644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25116 (or 25114 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 53171644 is about 7291.8889185176. Note that the first 3 decimals coincide. The cubic root of 53171644 is about 376.0336377783.

Adding to 53171644 its reverse (44617135), we get a palindrome (97788779).

The spelling of 53171644 in words is "fifty-three million, one hundred seventy-one thousand, six hundred forty-four".