1543123012253 has 4 divisors (see below), whose sum is σ = 1543127054940. Its totient is φ = 1543118969568.

The previous prime is 1543123012201. The next prime is 1543123012259. The reversal of 1543123012253 is 3522103213451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1459742407204 + 83380605049 = 1208198^2 + 288757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1543123012253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543123012259) 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, 1381208 + ... + 2234721.

It is an arithmetic number, because the mean of its divisors is an integer number (385781763735).

Almost surely, 2^{1543123012253} is an apocalyptic number.

It is an amenable number.

1543123012253 is a deficient number, since it is larger than the sum of its proper divisors (4042687).

1543123012253 is an equidigital number, since it uses as much as digits as its factorization.

1543123012253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042686.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 1543123012253 in words is "one trillion, five hundred forty-three billion, one hundred twenty-three million, twelve thousand, two hundred fifty-three".