1312155423431 has 8 divisors (see below), whose sum is σ = 1437249348720. Its totient is φ = 1192384643968.

The previous prime is 1312155423413. The next prime is 1312155423437. The reversal of 1312155423431 is 1343245512131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312155423431 - 2²² = 1312151229127 is a prime.

It is a super-2 number, since 2×1312155423431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312155423391 and 1312155423400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312155423437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330785941 + ... + 1330786926.

It is an arithmetic number, because the mean of its divisors is an integer number (179656168590).

Almost surely, 2^{1312155423431} is an apocalyptic number.

1312155423431 is a deficient number, since it is larger than the sum of its proper divisors (125093925289).

1312155423431 is a wasteful number, since it uses less digits than its factorization.

1312155423431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661572913.

The product of its digits is 43200, while the sum is 35.

The spelling of 1312155423431 in words is "one trillion, three hundred twelve billion, one hundred fifty-five million, four hundred twenty-three thousand, four hundred thirty-one".