621223133 has 4 divisors (see below), whose sum is σ = 624943200. Its totient is φ = 617503068.

The previous prime is 621223093. The next prime is 621223139. The reversal of 621223133 is 331322126.

621223133 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331322126 = 2 ⋅165661063.

It is a cyclic number.

It is not a de Polignac number, because 621223133 - 2¹⁴ = 621206749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621223099 and 621223108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621223139) 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, 1859783 + ... + 1860116.

It is an arithmetic number, because the mean of its divisors is an integer number (156235800).

Almost surely, 2^621223133 is an apocalyptic number.

It is an amenable number.

621223133 is a deficient number, since it is larger than the sum of its proper divisors (3720067).

621223133 is a wasteful number, since it uses less digits than its factorization.

621223133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720066.

The product of its digits is 1296, while the sum is 23.

The square root of 621223133 is about 24924.3481960913. The cubic root of 621223133 is about 853.2622653861.

Adding to 621223133 its reverse (331322126), we get a palindrome (952545259).

The spelling of 621223133 in words is "six hundred twenty-one million, two hundred twenty-three thousand, one hundred thirty-three".