15343144431431 has 4 divisors (see below), whose sum is σ = 15572146587192. Its totient is φ = 15114142275672.

The previous prime is 15343144431409. The next prime is 15343144431463. The reversal of 15343144431431 is 13413444134351.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15343144431431 is a prime.

It is a super-2 number, since 2×15343144431431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15343144431931) 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, 114501077780 + ... + 114501077913.

It is an arithmetic number, because the mean of its divisors is an integer number (3893036646798).

Almost surely, 2^{15343144431431} is an apocalyptic number.

15343144431431 is a deficient number, since it is larger than the sum of its proper divisors (229002155761).

15343144431431 is an equidigital number, since it uses as much as digits as its factorization.

15343144431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229002155760.

The product of its digits is 414720, while the sum is 41.

Adding to 15343144431431 its reverse (13413444134351), we get a palindrome (28756588565782).

The spelling of 15343144431431 in words is "fifteen trillion, three hundred forty-three billion, one hundred forty-four million, four hundred thirty-one thousand, four hundred thirty-one".