5545591 has 4 divisors (see below), whose sum is σ = 5621632. Its totient is φ = 5469552.

The previous prime is 5545567. The next prime is 5545609. The reversal of 5545591 is 1955455.

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 5545591 - 2²¹ = 3448439 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 (5545531) 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, 37911 + ... + 38056.

It is an arithmetic number, because the mean of its divisors is an integer number (1405408).

Almost surely, 2^5545591 is an apocalyptic number.

5545591 is a deficient number, since it is larger than the sum of its proper divisors (76041).

5545591 is an equidigital number, since it uses as much as digits as its factorization.

5545591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76040.

The product of its digits is 22500, while the sum is 34.

The square root of 5545591 is about 2354.9078538236. The cubic root of 5545591 is about 177.0038089555.

It can be divided in two parts, 55455 and 91, that multiplied together give a palindrome (5046405).

The spelling of 5545591 in words is "five million, five hundred forty-five thousand, five hundred ninety-one".