1531440013143 has 16 divisors (see below), whose sum is σ = 2077724039040. Its totient is φ = 1003136345376.

The previous prime is 1531440013133. The next prime is 1531440013171. The reversal of 1531440013143 is 3413100441351.

It is not a de Polignac number, because 1531440013143 - 2²⁶ = 1531372904279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1531440013143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531440013133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9715005 + ... + 9871382.

It is an arithmetic number, because the mean of its divisors is an integer number (129857752440).

Almost surely, 2^{1531440013143} is an apocalyptic number.

1531440013143 is a deficient number, since it is larger than the sum of its proper divisors (546284025897).

1531440013143 is a wasteful number, since it uses less digits than its factorization.

1531440013143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19586846.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 1531440013143 its reverse (3413100441351), we get a palindrome (4944540454494).

The spelling of 1531440013143 in words is "one trillion, five hundred thirty-one billion, four hundred forty million, thirteen thousand, one hundred forty-three".