55487773 has 4 divisors (see below), whose sum is σ = 60532128. Its totient is φ = 50443420.

The previous prime is 55487743. The next prime is 55487791. The reversal of 55487773 is 37778455.

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 not a de Polignac number, because 55487773 - 2⁹ = 55487261 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 (55487713) 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, 2522161 + ... + 2522182.

It is an arithmetic number, because the mean of its divisors is an integer number (15133032).

Almost surely, 2^55487773 is an apocalyptic number.

It is an amenable number.

55487773 is a deficient number, since it is larger than the sum of its proper divisors (5044355).

55487773 is a wasteful number, since it uses less digits than its factorization.

55487773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044354.

The product of its digits is 823200, while the sum is 46.

The square root of 55487773 is about 7449.0115451649. The cubic root of 55487773 is about 381.4161677158.

The spelling of 55487773 in words is "fifty-five million, four hundred eighty-seven thousand, seven hundred seventy-three".