1313051535531 has 32 divisors (see below), whose sum is σ = 2029928440320. Its totient is φ = 837270970272.

The previous prime is 1313051535491. The next prime is 1313051535547. The reversal of 1313051535531 is 1355351503131.

1313051535531 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 0 + 51 + 53 + 553 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1313051535531 is a prime.

It is a super-3 number, since 3×1313051535531³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1313051539531) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 23024905 + ... + 23081861.

It is an arithmetic number, because the mean of its divisors is an integer number (63435263760).

Almost surely, 2^{1313051535531} is an apocalyptic number.

1313051535531 is a deficient number, since it is larger than the sum of its proper divisors (716876904789).

1313051535531 is a wasteful number, since it uses less digits than its factorization.

1313051535531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94112 (or 94106 counting only the distinct ones).

The product of its (nonzero) digits is 50625, while the sum is 36.

The spelling of 1313051535531 in words is "one trillion, three hundred thirteen billion, fifty-one million, five hundred thirty-five thousand, five hundred thirty-one".