421321662527 has 2 divisors, whose sum is σ = 421321662528. Its totient is φ = 421321662526.

The previous prime is 421321662523. The next prime is 421321662581. The reversal of 421321662527 is 725266123124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421321662527 - 2² = 421321662523 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421321662523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210660831263 + 210660831264.

It is an arithmetic number, because the mean of its divisors is an integer number (210660831264).

Almost surely, 2^421321662527 is an apocalyptic number.

421321662527 is a deficient number, since it is larger than the sum of its proper divisors (1).

421321662527 is an equidigital number, since it uses as much as digits as its factorization.

421321662527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The spelling of 421321662527 in words is "four hundred twenty-one billion, three hundred twenty-one million, six hundred sixty-two thousand, five hundred twenty-seven".