513531531331545 has 16 divisors (see below), whose sum is σ = 823602113917632. Its totient is φ = 273232928781120.

The previous prime is 513531531331523. The next prime is 513531531331627. The reversal of 513531531331545 is 545133135135315.

It is a happy number.

It is not a de Polignac number, because 513531531331545 - 2²¹ = 513531529234393 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 513531531331494 and 513531531331503.

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 15 ways as a sum of consecutive naturals, for example, 40659655707 + ... + 40659668336.

It is an arithmetic number, because the mean of its divisors is an integer number (51475132119852).

Almost surely, 2^{513531531331545} is an apocalyptic number.

It is an amenable number.

513531531331545 is a deficient number, since it is larger than the sum of its proper divisors (310070582586087).

513531531331545 is a wasteful number, since it uses less digits than its factorization.

513531531331545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81319324472.

The product of its digits is 3037500, while the sum is 48.

The spelling of 513531531331545 in words is "five hundred thirteen trillion, five hundred thirty-one billion, five hundred thirty-one million, three hundred thirty-one thousand, five hundred forty-five".