421531425440303 has 4 divisors (see below), whose sum is σ = 421531966733088. Its totient is φ = 421530884147520.

The previous prime is 421531425440221. The next prime is 421531425440311. The reversal of 421531425440303 is 303044524135124.

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

It is a cyclic number.

It is not a de Polignac number, because 421531425440303 - 2¹⁰ = 421531425439279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421531425440803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269476583 + ... + 271036328.

It is an arithmetic number, because the mean of its divisors is an integer number (105382991683272).

Almost surely, 2^{421531425440303} is an apocalyptic number.

421531425440303 is a deficient number, since it is larger than the sum of its proper divisors (541292785).

421531425440303 is an equidigital number, since it uses as much as digits as its factorization.

421531425440303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541292784.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 421531425440303 its reverse (303044524135124), we get a palindrome (724575949575427).

The spelling of 421531425440303 in words is "four hundred twenty-one trillion, five hundred thirty-one billion, four hundred twenty-five million, four hundred forty thousand, three hundred three".