55556237 has 4 divisors (see below), whose sum is σ = 60606816. Its totient is φ = 50505660.

The previous prime is 55556231. The next prime is 55556251. The reversal of 55556237 is 73265555.

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 a de Polignac number, because none of the positive numbers 2^k-55556237 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 55556237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525273 + ... + 2525294.

It is an arithmetic number, because the mean of its divisors is an integer number (15151704).

Almost surely, 2^55556237 is an apocalyptic number.

It is an amenable number.

55556237 is a deficient number, since it is larger than the sum of its proper divisors (5050579).

55556237 is a wasteful number, since it uses less digits than its factorization.

55556237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050578.

The product of its digits is 157500, while the sum is 38.

The square root of 55556237 is about 7453.6056375421. The cubic root of 55556237 is about 381.5729742964.

The spelling of 55556237 in words is "fifty-five million, five hundred fifty-six thousand, two hundred thirty-seven".