1305243515133 has 6 divisors (see below), whose sum is σ = 1885351744094. Its totient is φ = 870162343416.

The previous prime is 1305243515123. The next prime is 1305243515153. The reversal of 1305243515133 is 3315153425031.

1305243515133 is a `hidden beast` number, since 1 + 3 + 0 + 5 + 2 + 4 + 3 + 515 + 133 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1297350614169 + 7892900964 = 1139013^2 + 88842^2 .

It is not a de Polignac number, because 1305243515133 - 2²² = 1305239320829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305243515113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72513528610 + ... + 72513528627.

Almost surely, 2^{1305243515133} is an apocalyptic number.

It is an amenable number.

1305243515133 is a deficient number, since it is larger than the sum of its proper divisors (580108228961).

1305243515133 is a wasteful number, since it uses less digits than its factorization.

1305243515133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145027057243 (or 145027057240 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 1305243515133 in words is "one trillion, three hundred five billion, two hundred forty-three million, five hundred fifteen thousand, one hundred thirty-three".