513146551531 has 4 divisors (see below), whose sum is σ = 513335697832. Its totient is φ = 512957405232.

The previous prime is 513146551507. The next prime is 513146551553. The reversal of 513146551531 is 135155641315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513146551531 - 2²⁵ = 513112997099 is a prime.

It is a super-2 number, since 2×513146551531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513146551831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94569081 + ... + 94574506.

It is an arithmetic number, because the mean of its divisors is an integer number (128333924458).

Almost surely, 2^513146551531 is an apocalyptic number.

513146551531 is a deficient number, since it is larger than the sum of its proper divisors (189146301).

513146551531 is a wasteful number, since it uses less digits than its factorization.

513146551531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189146300.

The product of its digits is 135000, while the sum is 40.

The spelling of 513146551531 in words is "five hundred thirteen billion, one hundred forty-six million, five hundred fifty-one thousand, five hundred thirty-one".