551629 has 4 divisors (see below), whose sum is σ = 594076. Its totient is φ = 509184.

The previous prime is 551597. The next prime is 551651. The reversal of 551629 is 926155.

551629 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 can be written as a sum of positive squares in 2 ways, for example, as 189225 + 362404 = 435^2 + 602^2 .

It is not a de Polignac number, because 551629 - 2⁵ = 551597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551597 and 551606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551659) 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, 21204 + ... + 21229.

It is an arithmetic number, because the mean of its divisors is an integer number (148519).

2⁵⁵¹⁶²⁹ is an apocalyptic number.

It is an amenable number.

551629 is a deficient number, since it is larger than the sum of its proper divisors (42447).

551629 is a wasteful number, since it uses less digits than its factorization.

551629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42446.

The product of its digits is 2700, while the sum is 28.

The square root of 551629 is about 742.7173082674. The cubic root of 551629 is about 82.0129366859.

The spelling of 551629 in words is "five hundred fifty-one thousand, six hundred twenty-nine".