5511391 has 4 divisors (see below), whose sum is σ = 5518800. Its totient is φ = 5503984.

The previous prime is 5511377. The next prime is 5511403. The reversal of 5511391 is 1931155.

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 5511391 - 2⁷ = 5511263 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 (5511491) 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, 2446 + ... + 4123.

It is an arithmetic number, because the mean of its divisors is an integer number (1379700).

Almost surely, 2^5511391 is an apocalyptic number.

5511391 is a deficient number, since it is larger than the sum of its proper divisors (7409).

5511391 is an equidigital number, since it uses as much as digits as its factorization.

5511391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408.

The product of its digits is 675, while the sum is 25.

The square root of 5511391 is about 2347.6351931252. The cubic root of 5511391 is about 176.6391939401.

The spelling of 5511391 in words is "five million, five hundred eleven thousand, three hundred ninety-one".