551953 has 4 divisors (see below), whose sum is σ = 559588. Its totient is φ = 544320.

The previous prime is 551951. The next prime is 551959. The reversal of 551953 is 359155.

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

It can be written as a sum of positive squares in 2 ways, for example, as 219024 + 332929 = 468^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 551953 - 2¹ = 551951 is a prime.

It is a super-2 number, since 2×551953² = 609304228418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3708 + ... + 3853.

It is an arithmetic number, because the mean of its divisors is an integer number (139897).

2⁵⁵¹⁹⁵³ is an apocalyptic number.

It is an amenable number.

551953 is a deficient number, since it is larger than the sum of its proper divisors (7635).

551953 is an equidigital number, since it uses as much as digits as its factorization.

551953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7634.

The product of its digits is 3375, while the sum is 28.

The square root of 551953 is about 742.9353942302. The cubic root of 551953 is about 82.0289903444.

The spelling of 551953 in words is "five hundred fifty-one thousand, nine hundred fifty-three".