555556541 has 4 divisors (see below), whose sum is σ = 560653500. Its totient is φ = 550459584.

The previous prime is 555556531. The next prime is 555556597. The reversal of 555556541 is 145655555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145655555 = 5 ⋅29131111.

It can be written as a sum of positive squares in 2 ways, for example, as 405861316 + 149695225 = 20146^2 + 12235^2 .

It is a cyclic number.

It is not a de Polignac number, because 555556541 - 2¹⁴ = 555540157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555556531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2548316 + ... + 2548533.

It is an arithmetic number, because the mean of its divisors is an integer number (140163375).

Almost surely, 2^555556541 is an apocalyptic number.

It is an amenable number.

555556541 is a deficient number, since it is larger than the sum of its proper divisors (5096959).

555556541 is a wasteful number, since it uses less digits than its factorization.

555556541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096958.

The product of its digits is 375000, while the sum is 41.

The square root of 555556541 is about 23570.2469439758. The cubic root of 555556541 is about 822.0711775062.

The spelling of 555556541 in words is "five hundred fifty-five million, five hundred fifty-six thousand, five hundred forty-one".