5538221477 has 2 divisors, whose sum is σ = 5538221478. Its totient is φ = 5538221476.

The previous prime is 5538221401. The next prime is 5538221489. The reversal of 5538221477 is 7741228355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3043618561 + 2494602916 = 55169^2 + 49946^2 .

It is a cyclic number.

It is not a de Polignac number, because 5538221477 - 2¹⁶ = 5538155941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5538220477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2769110738 + 2769110739.

It is an arithmetic number, because the mean of its divisors is an integer number (2769110739).

Almost surely, 2^5538221477 is an apocalyptic number.

It is an amenable number.

5538221477 is a deficient number, since it is larger than the sum of its proper divisors (1).

5538221477 is an equidigital number, since it uses as much as digits as its factorization.

5538221477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 44.

The square root of 5538221477 is about 74419.2278715656. The cubic root of 5538221477 is about 1769.2536754811.

The spelling of 5538221477 in words is "five billion, five hundred thirty-eight million, two hundred twenty-one thousand, four hundred seventy-seven".