621253533 has 8 divisors (see below), whose sum is σ = 828916288. Its totient is φ = 413879904.

The previous prime is 621253531. The next prime is 621253537. The reversal of 621253533 is 335352126.

621253533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621253533 - 2¹ = 621253531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621253533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621253531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67216 + ... + 75897.

It is an arithmetic number, because the mean of its divisors is an integer number (103614536).

Almost surely, 2^621253533 is an apocalyptic number.

It is an amenable number.

621253533 is a deficient number, since it is larger than the sum of its proper divisors (207662755).

621253533 is a wasteful number, since it uses less digits than its factorization.

621253533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144563.

The product of its digits is 16200, while the sum is 30.

The square root of 621253533 is about 24924.9580340670. The cubic root of 621253533 is about 853.2761834929.

The spelling of 621253533 in words is "six hundred twenty-one million, two hundred fifty-three thousand, five hundred thirty-three".