5478873221 has 2 divisors, whose sum is σ = 5478873222. Its totient is φ = 5478873220.

The previous prime is 5478873181. The next prime is 5478873233. The reversal of 5478873221 is 1223788745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5478072196 + 801025 = 74014^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 5478873221 - 2¹⁴ = 5478856837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5478873241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2739436610 + 2739436611.

It is an arithmetic number, because the mean of its divisors is an integer number (2739436611).

Almost surely, 2^5478873221 is an apocalyptic number.

It is an amenable number.

5478873221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5478873221 is an equidigital number, since it uses as much as digits as its factorization.

5478873221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 47.

The square root of 5478873221 is about 74019.4111095191. The cubic root of 5478873221 is about 1762.9111193995.

The spelling of 5478873221 in words is "five billion, four hundred seventy-eight million, eight hundred seventy-three thousand, two hundred twenty-one".