550857953 has 4 divisors (see below), whose sum is σ = 583261380. Its totient is φ = 518454528.

The previous prime is 550857869. The next prime is 550857977. The reversal of 550857953 is 359758055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 359758055 = 5 ⋅71951611.

It can be written as a sum of positive squares in 2 ways, for example, as 178676689 + 372181264 = 13367^2 + 19292^2 .

It is a cyclic number.

It is not a de Polignac number, because 550857953 - 2¹⁸ = 550595809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550857898 and 550857907.

It is not an unprimeable number, because it can be changed into a prime (550857353) 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, 16201688 + ... + 16201721.

It is an arithmetic number, because the mean of its divisors is an integer number (145815345).

Almost surely, 2^550857953 is an apocalyptic number.

It is an amenable number.

550857953 is a deficient number, since it is larger than the sum of its proper divisors (32403427).

550857953 is a wasteful number, since it uses less digits than its factorization.

550857953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32403426.

The product of its (nonzero) digits is 945000, while the sum is 47.

The square root of 550857953 is about 23470.3632907546. The cubic root of 550857953 is about 819.7470729947.

The spelling of 550857953 in words is "five hundred fifty million, eight hundred fifty-seven thousand, nine hundred fifty-three".