421546568831 has 2 divisors, whose sum is σ = 421546568832. Its totient is φ = 421546568830.

The previous prime is 421546568827. The next prime is 421546568867. The reversal of 421546568831 is 138865645124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421546568831 - 2² = 421546568827 is a prime.

It is a super-2 number, since 2×421546568831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421546568231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210773284415 + 210773284416.

It is an arithmetic number, because the mean of its divisors is an integer number (210773284416).

Almost surely, 2^421546568831 is an apocalyptic number.

421546568831 is a deficient number, since it is larger than the sum of its proper divisors (1).

421546568831 is an equidigital number, since it uses as much as digits as its factorization.

421546568831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5529600, while the sum is 53.

The spelling of 421546568831 in words is "four hundred twenty-one billion, five hundred forty-six million, five hundred sixty-eight thousand, eight hundred thirty-one".