621549488231 has 8 divisors (see below), whose sum is σ = 711319365120. Its totient is φ = 532023884568.

The previous prime is 621549488227. The next prime is 621549488249. The reversal of 621549488231 is 132884945126.

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

It is a cyclic number.

It is not a de Polignac number, because 621549488231 - 2² = 621549488227 is a prime.

It is a super-2 number, since 2×621549488231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621549488201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61062851 + ... + 61073028.

It is an arithmetic number, because the mean of its divisors is an integer number (88914920640).

Almost surely, 2^621549488231 is an apocalyptic number.

621549488231 is a deficient number, since it is larger than the sum of its proper divisors (89769876889).

621549488231 is a wasteful number, since it uses less digits than its factorization.

621549488231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122136613.

The product of its digits is 3317760, while the sum is 53.

The spelling of 621549488231 in words is "six hundred twenty-one billion, five hundred forty-nine million, four hundred eighty-eight thousand, two hundred thirty-one".