550907591 has 4 divisors (see below), whose sum is σ = 593285112. Its totient is φ = 508530072.

The previous prime is 550907573. The next prime is 550907629. The reversal of 550907591 is 195709055.

550907591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 550907591 - 2¹⁴ = 550891207 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 (550907501) 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, 21188741 + ... + 21188766.

It is an arithmetic number, because the mean of its divisors is an integer number (148321278).

Almost surely, 2^550907591 is an apocalyptic number.

550907591 is a deficient number, since it is larger than the sum of its proper divisors (42377521).

550907591 is a wasteful number, since it uses less digits than its factorization.

550907591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42377520.

The product of its (nonzero) digits is 70875, while the sum is 41.

The square root of 550907591 is about 23471.4207281962. The cubic root of 550907591 is about 819.7716948189.

The spelling of 550907591 in words is "five hundred fifty million, nine hundred seven thousand, five hundred ninety-one".