55537887 has 4 divisors (see below), whose sum is σ = 74050520. Its totient is φ = 37025256.

The previous prime is 55537883. The next prime is 55537907. The reversal of 55537887 is 78873555.

It is a happy number.

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

It is not a de Polignac number, because 55537887 - 2² = 55537883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55537883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9256312 + ... + 9256317.

It is an arithmetic number, because the mean of its divisors is an integer number (18512630).

Almost surely, 2^55537887 is an apocalyptic number.

55537887 is a deficient number, since it is larger than the sum of its proper divisors (18512633).

55537887 is a wasteful number, since it uses less digits than its factorization.

55537887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18512632.

The product of its digits is 1176000, while the sum is 48.

The square root of 55537887 is about 7452.3745880088. The cubic root of 55537887 is about 381.5309590011.

The spelling of 55537887 in words is "fifty-five million, five hundred thirty-seven thousand, eight hundred eighty-seven".