628213133 has 4 divisors (see below), whose sum is σ = 628605180. Its totient is φ = 627821088.

The previous prime is 628213129. The next prime is 628213163. The reversal of 628213133 is 331312826.

628213133 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 453391849 + 174821284 = 21293^2 + 13222^2 .

It is a cyclic number.

It is not a de Polignac number, because 628213133 - 2² = 628213129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628213096 and 628213105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628213123) 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, 193610 + ... + 196827.

It is an arithmetic number, because the mean of its divisors is an integer number (157151295).

Almost surely, 2^628213133 is an apocalyptic number.

It is an amenable number.

628213133 is a deficient number, since it is larger than the sum of its proper divisors (392047).

628213133 is a wasteful number, since it uses less digits than its factorization.

628213133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392046.

The product of its digits is 5184, while the sum is 29.

The square root of 628213133 is about 25064.1802778387. The cubic root of 628213133 is about 856.4506377074.

Adding to 628213133 its reverse (331312826), we get a palindrome (959525959).

The spelling of 628213133 in words is "six hundred twenty-eight million, two hundred thirteen thousand, one hundred thirty-three".