5561971 has 2 divisors, whose sum is σ = 5561972. Its totient is φ = 5561970.

The previous prime is 5561953. The next prime is 5561977. The reversal of 5561971 is 1791655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5561971 - 2⁹ = 5561459 is a prime.

It is not a weakly prime, because it can be changed into another prime (5561977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780985 + 2780986.

It is an arithmetic number, because the mean of its divisors is an integer number (2780986).

Almost surely, 2^5561971 is an apocalyptic number.

5561971 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561971 is an equidigital number, since it uses as much as digits as its factorization.

5561971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 34.

The square root of 5561971 is about 2358.3831325720. The cubic root of 5561971 is about 177.1779095753.

It can be divided in two parts, 55 and 61971, that added together give a palindrome (62026).

The spelling of 5561971 in words is "five million, five hundred sixty-one thousand, nine hundred seventy-one".