550899551 has 4 divisors (see below), whose sum is σ = 556354104. Its totient is φ = 545445000.

The previous prime is 550899511. The next prime is 550899553. The reversal of 550899551 is 155998055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155998055 = 5 ⋅31199611.

It is a cyclic number.

It is not a de Polignac number, because 550899551 - 2⁶ = 550899487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550899496 and 550899505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550899553) 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, 2727125 + ... + 2727326.

It is an arithmetic number, because the mean of its divisors is an integer number (139088526).

Almost surely, 2^550899551 is an apocalyptic number.

550899551 is a deficient number, since it is larger than the sum of its proper divisors (5454553).

550899551 is a wasteful number, since it uses less digits than its factorization.

550899551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454552.

The product of its (nonzero) digits is 405000, while the sum is 47.

The square root of 550899551 is about 23471.2494554508. The cubic root of 550899551 is about 819.7677068564.

The spelling of 550899551 in words is "five hundred fifty million, eight hundred ninety-nine thousand, five hundred fifty-one".