1285531342515 has 40 divisors (see below), whose sum is σ = 2633638819680. Its totient is φ = 587671469568.

The previous prime is 1285531342471. The next prime is 1285531342547. The reversal of 1285531342515 is 5152431355821.

1285531342515 is a `hidden beast` number, since 1 + 2 + 8 + 553 + 1 + 3 + 42 + 51 + 5 = 666.

It is not a de Polignac number, because 1285531342515 - 2⁸ = 1285531342259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 3.

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 39 ways as a sum of consecutive naturals, for example, 226722270 + ... + 226727939.

It is an arithmetic number, because the mean of its divisors is an integer number (65840970492).

Almost surely, 2^{1285531342515} is an apocalyptic number.

1285531342515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1285531342515 is an abundant number, since it is smaller than the sum of its proper divisors (1348107477165).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285531342515 is an equidigital number, since it uses as much as digits as its factorization.

1285531342515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453450233 (or 453450224 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The spelling of 1285531342515 in words is "one trillion, two hundred eighty-five billion, five hundred thirty-one million, three hundred forty-two thousand, five hundred fifteen".