5521891 has 2 divisors, whose sum is σ = 5521892. Its totient is φ = 5521890.

The previous prime is 5521819. The next prime is 5521927. The reversal of 5521891 is 1981255.

Together with previous prime (5521819) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5521891 - 2²¹ = 3424739 is a prime.

It is not a weakly prime, because it can be changed into another prime (5521801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2760945 + 2760946.

It is an arithmetic number, because the mean of its divisors is an integer number (2760946).

Almost surely, 2^5521891 is an apocalyptic number.

5521891 is a deficient number, since it is larger than the sum of its proper divisors (1).

5521891 is an equidigital number, since it uses as much as digits as its factorization.

5521891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 31.

The square root of 5521891 is about 2349.8704219595. The cubic root of 5521891 is about 176.7512972156.

The spelling of 5521891 in words is "five million, five hundred twenty-one thousand, eight hundred ninety-one".