550412561 has 4 divisors (see below), whose sum is σ = 550474752. Its totient is φ = 550350372.

The previous prime is 550412549. The next prime is 550412567. The reversal of 550412561 is 165214055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 550412561 - 2⁶ = 550412497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550412567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15065 + ... + 36438.

It is an arithmetic number, because the mean of its divisors is an integer number (137618688).

Almost surely, 2^550412561 is an apocalyptic number.

It is an amenable number.

550412561 is a deficient number, since it is larger than the sum of its proper divisors (62191).

550412561 is a wasteful number, since it uses less digits than its factorization.

550412561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62190.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 550412561 is about 23460.8729803475. The cubic root of 550412561 is about 819.5260800070.

The spelling of 550412561 in words is "five hundred fifty million, four hundred twelve thousand, five hundred sixty-one".