550215541 has 4 divisors (see below), whose sum is σ = 555263500. Its totient is φ = 545167584.

The previous prime is 550215529. The next prime is 550215551. The reversal of 550215541 is 145512055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 350812900 + 199402641 = 18730^2 + 14121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550215541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550215551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2523816 + ... + 2524033.

It is an arithmetic number, because the mean of its divisors is an integer number (138815875).

Almost surely, 2^550215541 is an apocalyptic number.

It is an amenable number.

550215541 is a deficient number, since it is larger than the sum of its proper divisors (5047959).

550215541 is a wasteful number, since it uses less digits than its factorization.

550215541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5047958.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 550215541 is about 23456.6736985447. The cubic root of 550215541 is about 819.4282853049.

Adding to 550215541 its reverse (145512055), we get a palindrome (695727596).

The spelling of 550215541 in words is "five hundred fifty million, two hundred fifteen thousand, five hundred forty-one".