1543040420323 has 8 divisors (see below), whose sum is σ = 1580692508640. Its totient is φ = 1505389139520.

The previous prime is 1543040420287. The next prime is 1543040420347. The reversal of 1543040420323 is 3230240403451.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1543040420323 is a prime.

It is a super-2 number, since 2×1543040420323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1543040420393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5860338 + ... + 6117976.

It is an arithmetic number, because the mean of its divisors is an integer number (197586563580).

Almost surely, 2^{1543040420323} is an apocalyptic number.

1543040420323 is a deficient number, since it is larger than the sum of its proper divisors (37652088317).

1543040420323 is a wasteful number, since it uses less digits than its factorization.

1543040420323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403757.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 1543040420323 its reverse (3230240403451), we get a palindrome (4773280823774).

The spelling of 1543040420323 in words is "one trillion, five hundred forty-three billion, forty million, four hundred twenty thousand, three hundred twenty-three".