55991837 has 8 divisors (see below), whose sum is σ = 63188640. Its totient is φ = 49146160.

The previous prime is 55991827. The next prime is 55991843. The reversal of 55991837 is 73819955.

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 55991837 - 2¹⁶ = 55926301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55991791 and 55991800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55991827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87443 + ... + 88080.

It is an arithmetic number, because the mean of its divisors is an integer number (7898580).

Almost surely, 2^55991837 is an apocalyptic number.

It is an amenable number.

55991837 is a deficient number, since it is larger than the sum of its proper divisors (7196803).

55991837 is a wasteful number, since it uses less digits than its factorization.

55991837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175563.

The product of its digits is 340200, while the sum is 47.

The square root of 55991837 is about 7482.7693402911. The cubic root of 55991837 is about 382.5676460592.

It can be divided in two parts, 559918 and 37, that added together give a palindrome (559955).

The spelling of 55991837 in words is "fifty-five million, nine hundred ninety-one thousand, eight hundred thirty-seven".