53871661 has 8 divisors (see below), whose sum is σ = 55101600. Its totient is φ = 52652400.

The previous prime is 53871659. The next prime is 53871673. The reversal of 53871661 is 16617835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53871661 - 2¹ = 53871659 is a prime.

It is a super-3 number, since 3×53871661³ (a number of 24 digits) contains 333 as substring.

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 53871661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53871641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8011 + ... + 13111.

It is an arithmetic number, because the mean of its divisors is an integer number (6887700).

Almost surely, 2^53871661 is an apocalyptic number.

It is an amenable number.

53871661 is a deficient number, since it is larger than the sum of its proper divisors (1229939).

53871661 is a wasteful number, since it uses less digits than its factorization.

53871661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339.

The product of its digits is 30240, while the sum is 37.

The square root of 53871661 is about 7339.7316708447. The cubic root of 53871661 is about 377.6766385314.

The spelling of 53871661 in words is "fifty-three million, eight hundred seventy-one thousand, six hundred sixty-one".