4055555521 has 2 divisors, whose sum is σ = 4055555522. Its totient is φ = 4055555520.

The previous prime is 4055555461. The next prime is 4055555561. The reversal of 4055555521 is 1255555504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4043052225 + 12503296 = 63585^2 + 3536^2 .

It is a cyclic number.

It is not a de Polignac number, because 4055555521 - 2²³ = 4047166913 is a prime.

It is not a weakly prime, because it can be changed into another prime (4055555561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027777760 + 2027777761.

It is an arithmetic number, because the mean of its divisors is an integer number (2027777761).

Almost surely, 2^4055555521 is an apocalyptic number.

It is an amenable number.

4055555521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4055555521 is an equidigital number, since it uses as much as digits as its factorization.

4055555521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125000, while the sum is 37.

The square root of 4055555521 is about 63683.2436438346. The cubic root of 4055555521 is about 1594.7163629904.

The spelling of 4055555521 in words is "four billion, fifty-five million, five hundred fifty-five thousand, five hundred twenty-one".