55357387 has 4 divisors (see below), whose sum is σ = 56401920. Its totient is φ = 54312856.

The previous prime is 55357381. The next prime is 55357397. The reversal of 55357387 is 78375355.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55357387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55357381) 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, 522187 + ... + 522292.

It is an arithmetic number, because the mean of its divisors is an integer number (14100480).

Almost surely, 2^55357387 is an apocalyptic number.

55357387 is a deficient number, since it is larger than the sum of its proper divisors (1044533).

55357387 is a wasteful number, since it uses less digits than its factorization.

55357387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044532.

The product of its digits is 441000, while the sum is 43.

The square root of 55357387 is about 7440.2544983354. The cubic root of 55357387 is about 381.1171809311.

The spelling of 55357387 in words is "fifty-five million, three hundred fifty-seven thousand, three hundred eighty-seven".