55275587 has 4 divisors (see below), whose sum is σ = 55319376. Its totient is φ = 55231800.

The previous prime is 55275569. The next prime is 55275613. The reversal of 55275587 is 78557255.

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 55275587 - 2⁶ = 55275523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55275557) 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, 19943 + ... + 22544.

It is an arithmetic number, because the mean of its divisors is an integer number (13829844).

Almost surely, 2^55275587 is an apocalyptic number.

55275587 is a deficient number, since it is larger than the sum of its proper divisors (43789).

55275587 is a wasteful number, since it uses less digits than its factorization.

55275587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43788.

The product of its digits is 490000, while the sum is 44.

The square root of 55275587 is about 7434.7553423095. The cubic root of 55275587 is about 380.9293664685.

The spelling of 55275587 in words is "fifty-five million, two hundred seventy-five thousand, five hundred eighty-seven".