421043455153 has 4 divisors (see below), whose sum is σ = 421062618100. Its totient is φ = 421024292208.

The previous prime is 421043455123. The next prime is 421043455159. The reversal of 421043455153 is 351554340124.

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 379513906209 + 41529548944 = 616047^2 + 203788^2 .

It is a cyclic number.

It is not a de Polignac number, because 421043455153 - 2⁵ = 421043455121 is a prime.

It is a super-2 number, since 2×421043455153² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421043455159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9548478 + ... + 9592471.

It is an arithmetic number, because the mean of its divisors is an integer number (105265654525).

Almost surely, 2^421043455153 is an apocalyptic number.

It is an amenable number.

421043455153 is a deficient number, since it is larger than the sum of its proper divisors (19162947).

421043455153 is a wasteful number, since it uses less digits than its factorization.

421043455153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19162946.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 421043455153 its reverse (351554340124), we get a palindrome (772597795277).

The spelling of 421043455153 in words is "four hundred twenty-one billion, forty-three million, four hundred fifty-five thousand, one hundred fifty-three".