53171665 has 24 divisors (see below), whose sum is σ = 70025472. Its totient is φ = 38711040.

The previous prime is 53171659. The next prime is 53171681. The reversal of 53171665 is 56617135.

It is not a de Polignac number, because 53171665 - 2¹⁹ = 52647377 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53171665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44202 + ... + 45388.

It is an arithmetic number, because the mean of its divisors is an integer number (2917728).

Almost surely, 2^53171665 is an apocalyptic number.

It is an amenable number.

53171665 is a deficient number, since it is larger than the sum of its proper divisors (16853807).

53171665 is a wasteful number, since it uses less digits than its factorization.

53171665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257 (or 1240 counting only the distinct ones).

The product of its digits is 18900, while the sum is 34.

The square root of 53171665 is about 7291.8903584736. The cubic root of 53171665 is about 376.0336872828.

The spelling of 53171665 in words is "fifty-three million, one hundred seventy-one thousand, six hundred sixty-five".