421554254431 has 4 divisors (see below), whose sum is σ = 421934376600. Its totient is φ = 421174132264.

The previous prime is 421554254419. The next prime is 421554254501. The reversal of 421554254431 is 134452455124.

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 421554254431 - 2⁹ = 421554253919 is a prime.

It is a super-2 number, since 2×421554254431² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421554254531) 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, 190059421 + ... + 190061638.

It is an arithmetic number, because the mean of its divisors is an integer number (105483594150).

Almost surely, 2^421554254431 is an apocalyptic number.

421554254431 is a deficient number, since it is larger than the sum of its proper divisors (380122169).

421554254431 is a wasteful number, since it uses less digits than its factorization.

421554254431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380122168.

The product of its digits is 384000, while the sum is 40.

The spelling of 421554254431 in words is "four hundred twenty-one billion, five hundred fifty-four million, two hundred fifty-four thousand, four hundred thirty-one".