550557091 has 18 divisors (see below), whose sum is σ = 675029340. Its totient is φ = 446487552.

The previous prime is 550557089. The next prime is 550557101. The reversal of 550557091 is 190755055.

It is not a de Polignac number, because 550557091 - 2¹ = 550557089 is a prime.

It is a super-2 number, since 2×550557091² = 606226220900764562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 550557091.

It is not an unprimeable number, because it can be changed into a prime (550557001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 715555 + ... + 716323.

It is an arithmetic number, because the mean of its divisors is an integer number (37501630).

Almost surely, 2^550557091 is an apocalyptic number.

550557091 is a deficient number, since it is larger than the sum of its proper divisors (124472249).

550557091 is an frugal number, since it uses more digits than its factorization.

550557091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 39375, while the sum is 37.

The square root of 550557091 is about 23463.9530130794. The cubic root of 550557091 is about 819.5978054404.

The spelling of 550557091 in words is "five hundred fifty million, five hundred fifty-seven thousand, ninety-one".