55375587 has 12 divisors (see below), whose sum is σ = 82745520. Its totient is φ = 35643888.

The previous prime is 55375561. The next prime is 55375601. The reversal of 55375587 is 78557355.

It is not a de Polignac number, because 55375587 - 2²⁰ = 54327011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55375087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105823 + ... + 106344.

It is an arithmetic number, because the mean of its divisors is an integer number (6895460).

Almost surely, 2^55375587 is an apocalyptic number.

55375587 is a deficient number, since it is larger than the sum of its proper divisors (27369933).

55375587 is a wasteful number, since it uses less digits than its factorization.

55375587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212202 (or 212199 counting only the distinct ones).

The product of its digits is 735000, while the sum is 45.

The square root of 55375587 is about 7441.4774742654. The cubic root of 55375587 is about 381.1589433351.

The spelling of 55375587 in words is "fifty-five million, three hundred seventy-five thousand, five hundred eighty-seven".