1311231450015 has 24 divisors (see below), whose sum is σ = 2272902211008. Its totient is φ = 699292353600.

The previous prime is 1311231449923. The next prime is 1311231450059. The reversal of 1311231450015 is 5100541321131.

1311231450015 is a `hidden beast` number, since 1 + 3 + 112 + 31 + 4 + 500 + 15 = 666.

It is not a de Polignac number, because 1311231450015 - 2³³ = 1302641515423 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 394362 + ... + 1666728.

It is an arithmetic number, because the mean of its divisors is an integer number (94704258792).

Almost surely, 2^{1311231450015} is an apocalyptic number.

1311231450015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311231450015 is a deficient number, since it is larger than the sum of its proper divisors (961670760993).

1311231450015 is a wasteful number, since it uses less digits than its factorization.

1311231450015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295279 (or 1295276 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 1311231450015 its reverse (5100541321131), we get a palindrome (6411772771146).

The spelling of 1311231450015 in words is "one trillion, three hundred eleven billion, two hundred thirty-one million, four hundred fifty thousand, fifteen".