315143311545 has 48 divisors (see below), whose sum is σ = 555114457872. Its totient is φ = 165359923200.

The previous prime is 315143311541. The next prime is 315143311583. The reversal of 315143311545 is 545113341513.

315143311545 is a `hidden beast` number, since 31 + 51 + 4 + 3 + 31 + 1 + 545 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 25868218896 + 289275092649 = 160836^2 + 537843^2 .

It is not a de Polignac number, because 315143311545 - 2² = 315143311541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (315143311541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1197667 + ... + 1436903.

It is an arithmetic number, because the mean of its divisors is an integer number (11564884539).

Almost surely, 2^315143311545 is an apocalyptic number.

It is an amenable number.

315143311545 is a deficient number, since it is larger than the sum of its proper divisors (239971146327).

315143311545 is a wasteful number, since it uses less digits than its factorization.

315143311545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239722 (or 239719 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The spelling of 315143311545 in words is "three hundred fifteen billion, one hundred forty-three million, three hundred eleven thousand, five hundred forty-five".