55691371 has 4 divisors (see below), whose sum is σ = 58967352. Its totient is φ = 52415392.

The previous prime is 55691369. The next prime is 55691453. The reversal of 55691371 is 17319655.

55691371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55691371 - 2¹ = 55691369 is a prime.

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 55691371.

It is not an unprimeable number, because it can be changed into a prime (55691341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637965 + ... + 1637998.

It is an arithmetic number, because the mean of its divisors is an integer number (14741838).

Almost surely, 2^55691371 is an apocalyptic number.

55691371 is a deficient number, since it is larger than the sum of its proper divisors (3275981).

55691371 is a wasteful number, since it uses less digits than its factorization.

55691371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275980.

The product of its digits is 28350, while the sum is 37.

The square root of 55691371 is about 7462.6651405513. The cubic root of 55691371 is about 381.8821008927.

The spelling of 55691371 in words is "fifty-five million, six hundred ninety-one thousand, three hundred seventy-one".