4223540555261 has 2 divisors, whose sum is σ = 4223540555262. Its totient is φ = 4223540555260.

The previous prime is 4223540555251. The next prime is 4223540555327. The reversal of 4223540555261 is 1625550453224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3263463928036 + 960076627225 = 1806506^2 + 979835^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223540555261 - 2¹⁰ = 4223540554237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4223540555251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111770277630 + 2111770277631.

It is an arithmetic number, because the mean of its divisors is an integer number (2111770277631).

Almost surely, 2^{4223540555261} is an apocalyptic number.

It is an amenable number.

4223540555261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4223540555261 is an equidigital number, since it uses as much as digits as its factorization.

4223540555261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440000, while the sum is 44.

The spelling of 4223540555261 in words is "four trillion, two hundred twenty-three billion, five hundred forty million, five hundred fifty-five thousand, two hundred sixty-one".