621653223 has 16 divisors (see below), whose sum is σ = 865486080. Its totient is φ = 396152064.

The previous prime is 621653159. The next prime is 621653233. The reversal of 621653223 is 322356126.

It is not a de Polignac number, because 621653223 - 2⁶ = 621653159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621653233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194583 + ... + 197751.

It is an arithmetic number, because the mean of its divisors is an integer number (54092880).

Almost surely, 2^621653223 is an apocalyptic number.

621653223 is a deficient number, since it is larger than the sum of its proper divisors (243832857).

621653223 is a wasteful number, since it uses less digits than its factorization.

621653223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038.

The product of its digits is 12960, while the sum is 30.

The square root of 621653223 is about 24932.9746119471. The cubic root of 621653223 is about 853.4591323360.

The spelling of 621653223 in words is "six hundred twenty-one million, six hundred fifty-three thousand, two hundred twenty-three".