423421221400 has 24 divisors (see below), whose sum is σ = 984454340220. Its totient is φ = 169368488480.

The previous prime is 423421221361. The next prime is 423421221409. The reversal of 423421221400 is 4122124324.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423421221409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1058552854 + ... + 1058553253.

Almost surely, 2^423421221400 is an apocalyptic number.

423421221400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423421221400 is an abundant number, since it is smaller than the sum of its proper divisors (561033118820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423421221400 is a wasteful number, since it uses less digits than its factorization.

423421221400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117106123 (or 2117106114 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 423421221400 its reverse (4122124324), we get a palindrome (427543345724).

The spelling of 423421221400 in words is "four hundred twenty-three billion, four hundred twenty-one million, two hundred twenty-one thousand, four hundred".