621004155223 has 4 divisors (see below), whose sum is σ = 642418091640. Its totient is φ = 599590218808.

The previous prime is 621004155197. The next prime is 621004155241. The reversal of 621004155223 is 322551400126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621004155223 - 2²⁵ = 620970600791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621004155283) 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, 10706968165 + ... + 10706968222.

It is an arithmetic number, because the mean of its divisors is an integer number (160604522910).

Almost surely, 2^621004155223 is an apocalyptic number.

621004155223 is a deficient number, since it is larger than the sum of its proper divisors (21413936417).

621004155223 is a wasteful number, since it uses less digits than its factorization.

621004155223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21413936416.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 621004155223 its reverse (322551400126), we get a palindrome (943555555349).

The spelling of 621004155223 in words is "six hundred twenty-one billion, four million, one hundred fifty-five thousand, two hundred twenty-three".