621549488227 has 2 divisors, whose sum is σ = 621549488228. Its totient is φ = 621549488226.

The previous prime is 621549488201. The next prime is 621549488249. The reversal of 621549488227 is 722884945126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621549488227 - 2¹⁵ = 621549455459 is a prime.

It is a super-2 number, since 2×621549488227² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621549483227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310774744113 + 310774744114.

It is an arithmetic number, because the mean of its divisors is an integer number (310774744114).

Almost surely, 2^621549488227 is an apocalyptic number.

621549488227 is a deficient number, since it is larger than the sum of its proper divisors (1).

621549488227 is an equidigital number, since it uses as much as digits as its factorization.

621549488227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 58.

The spelling of 621549488227 in words is "six hundred twenty-one billion, five hundred forty-nine million, four hundred eighty-eight thousand, two hundred twenty-seven".