55985537 has 4 divisors (see below), whose sum is σ = 56426496. Its totient is φ = 55544580.

The previous prime is 55985521. The next prime is 55985549. The reversal of 55985537 is 73558955.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73558955 = 5 ⋅14711791.

It is a cyclic number.

It is not a de Polignac number, because 55985537 - 2⁴ = 55985521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55985491 and 55985500.

It is not an unprimeable number, because it can be changed into a prime (55385537) 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, 220289 + ... + 220542.

It is an arithmetic number, because the mean of its divisors is an integer number (14106624).

Almost surely, 2^55985537 is an apocalyptic number.

It is an amenable number.

55985537 is a deficient number, since it is larger than the sum of its proper divisors (440959).

55985537 is a wasteful number, since it uses less digits than its factorization.

55985537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440958.

The product of its digits is 945000, while the sum is 47.

The square root of 55985537 is about 7482.3483613101. The cubic root of 55985537 is about 382.5532971428.

The spelling of 55985537 in words is "fifty-five million, nine hundred eighty-five thousand, five hundred thirty-seven".