621223271 has 2 divisors, whose sum is σ = 621223272. Its totient is φ = 621223270.

The previous prime is 621223249. The next prime is 621223277. The reversal of 621223271 is 172322126.

621223271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621223271 - 2¹⁸ = 620961127 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621223271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621223277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310611635 + 310611636.

It is an arithmetic number, because the mean of its divisors is an integer number (310611636).

Almost surely, 2^621223271 is an apocalyptic number.

621223271 is a deficient number, since it is larger than the sum of its proper divisors (1).

621223271 is an equidigital number, since it uses as much as digits as its factorization.

621223271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 621223271 is about 24924.3509644685. The cubic root of 621223271 is about 853.2623285680.

Adding to 621223271 its reverse (172322126), we get a palindrome (793545397).

The spelling of 621223271 in words is "six hundred twenty-one million, two hundred twenty-three thousand, two hundred seventy-one".