620021431022231 has 4 divisors (see below), whose sum is σ = 708595921168272. Its totient is φ = 531446940876192.

The previous prime is 620021431022177. The next prime is 620021431022249. The reversal of 620021431022231 is 132220134120026.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620021431022231 is a prime.

It is a super-3 number, since 3×620021431022231³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620021431022194 and 620021431022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620021431022431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44287245073010 + ... + 44287245073023.

It is an arithmetic number, because the mean of its divisors is an integer number (177148980292068).

Almost surely, 2^{620021431022231} is an apocalyptic number.

620021431022231 is a deficient number, since it is larger than the sum of its proper divisors (88574490146041).

620021431022231 is an equidigital number, since it uses as much as digits as its factorization.

620021431022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88574490146040.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 620021431022231 its reverse (132220134120026), we get a palindrome (752241565142257).

The spelling of 620021431022231 in words is "six hundred twenty trillion, twenty-one billion, four hundred thirty-one million, twenty-two thousand, two hundred thirty-one".