5561311 has 4 divisors (see below), whose sum is σ = 6355792. Its totient is φ = 4766832.

The previous prime is 5561299. The next prime is 5561321. The reversal of 5561311 is 1131655.

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

It is not a de Polignac number, because 5561311 - 2¹⁵ = 5528543 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 (5561321) 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, 397230 + ... + 397243.

It is an arithmetic number, because the mean of its divisors is an integer number (1588948).

Almost surely, 2^5561311 is an apocalyptic number.

5561311 is a deficient number, since it is larger than the sum of its proper divisors (794481).

5561311 is an equidigital number, since it uses as much as digits as its factorization.

5561311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794480.

The product of its digits is 450, while the sum is 22.

The square root of 5561311 is about 2358.2432020468. The cubic root of 5561311 is about 177.1709011457.

Adding to 5561311 its reverse (1131655), we get a palindrome (6692966).

The spelling of 5561311 in words is "five million, five hundred sixty-one thousand, three hundred eleven".