1543400431420 has 24 divisors (see below), whose sum is σ = 3250481384304. Its totient is φ = 615581033856.

The previous prime is 1543400431387. The next prime is 1543400431439. The reversal of 1543400431420 is 241340043451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111189057 + ... + 111202936.

It is an arithmetic number, because the mean of its divisors is an integer number (135436724346).

Almost surely, 2^{1543400431420} is an apocalyptic number.

1543400431420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1543400431420 is an abundant number, since it is smaller than the sum of its proper divisors (1707080952884).

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

1543400431420 is a wasteful number, since it uses less digits than its factorization.

1543400431420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222392349 (or 222392347 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 1543400431420 its reverse (241340043451), we get a palindrome (1784740474871).

The spelling of 1543400431420 in words is "one trillion, five hundred forty-three billion, four hundred million, four hundred thirty-one thousand, four hundred twenty".