421531153400 has 384 divisors, whose sum is σ = 1217453328000. Its totient is φ = 135204249600.

The previous prime is 421531153367. The next prime is 421531153411. The reversal of 421531153400 is 4351135124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 211081202 + ... + 211083198.

It is an arithmetic number, because the mean of its divisors is an integer number (3170451375).

Almost surely, 2^421531153400 is an apocalyptic number.

421531153400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421531153400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608726664000).

421531153400 is an abundant number, since it is smaller than the sum of its proper divisors (795922174600).

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

421531153400 is a wasteful number, since it uses less digits than its factorization.

421531153400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232 (or 2209 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 421531153400 its reverse (4351135124), we get a palindrome (425882288524).

The spelling of 421531153400 in words is "four hundred twenty-one billion, five hundred thirty-one million, one hundred fifty-three thousand, four hundred".