1315533443231 has 4 divisors (see below), whose sum is σ = 1503466792272. Its totient is φ = 1127600094192.

The previous prime is 1315533443209. The next prime is 1315533443291. The reversal of 1315533443231 is 1323443355131.

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

It is a cyclic number.

It is not a de Polignac number, because 1315533443231 - 2³⁰ = 1314459701407 is a prime.

It is a super-2 number, since 2×1315533443231² (a number of 25 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 (1315533443291) 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, 93966674510 + ... + 93966674523.

It is an arithmetic number, because the mean of its divisors is an integer number (375866698068).

Almost surely, 2^{1315533443231} is an apocalyptic number.

1315533443231 is a deficient number, since it is larger than the sum of its proper divisors (187933349041).

1315533443231 is an equidigital number, since it uses as much as digits as its factorization.

1315533443231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187933349040.

The product of its digits is 194400, while the sum is 38.

Adding to 1315533443231 its reverse (1323443355131), we get a palindrome (2638976798362).

The spelling of 1315533443231 in words is "one trillion, three hundred fifteen billion, five hundred thirty-three million, four hundred forty-three thousand, two hundred thirty-one".