421503433133 has 4 divisors (see below), whose sum is σ = 422097937980. Its totient is φ = 420908928288.

The previous prime is 421503433121. The next prime is 421503433187. The reversal of 421503433133 is 331334305124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40841580649 + 380661852484 = 202093^2 + 616978^2 .

It is a cyclic number.

It is not a de Polignac number, because 421503433133 - 2²⁶ = 421436324269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421503433133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421503433193) 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, 297251360 + ... + 297252777.

It is an arithmetic number, because the mean of its divisors is an integer number (105524484495).

Almost surely, 2^421503433133 is an apocalyptic number.

It is an amenable number.

421503433133 is a deficient number, since it is larger than the sum of its proper divisors (594504847).

421503433133 is an equidigital number, since it uses as much as digits as its factorization.

421503433133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594504846.

The product of its (nonzero) digits is 38880, while the sum is 32.

Adding to 421503433133 its reverse (331334305124), we get a palindrome (752837738257).

The spelling of 421503433133 in words is "four hundred twenty-one billion, five hundred three million, four hundred thirty-three thousand, one hundred thirty-three".