55871637 has 4 divisors (see below), whose sum is σ = 74495520. Its totient is φ = 37247756.

The previous prime is 55871633. The next prime is 55871653. The reversal of 55871637 is 73617855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55871637 - 2² = 55871633 is a prime.

It is a super-3 number, since 3×55871637³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55871633) 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 3 ways as a sum of consecutive naturals, for example, 9311937 + ... + 9311942.

It is an arithmetic number, because the mean of its divisors is an integer number (18623880).

Almost surely, 2^55871637 is an apocalyptic number.

It is an amenable number.

55871637 is a deficient number, since it is larger than the sum of its proper divisors (18623883).

55871637 is a wasteful number, since it uses less digits than its factorization.

55871637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18623882.

The product of its digits is 176400, while the sum is 42.

The square root of 55871637 is about 7474.7332393872. The cubic root of 55871637 is about 382.2936919823.

The spelling of 55871637 in words is "fifty-five million, eight hundred seventy-one thousand, six hundred thirty-seven".