513145531 has 8 divisors (see below), whose sum is σ = 527402304. Its totient is φ = 498994440.

The previous prime is 513145469. The next prime is 513145541. The reversal of 513145531 is 135541315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 513145531 - 2¹⁵ = 513112763 is a prime.

It is a super-2 number, since 2×513145531² = 526636671970543922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513145531.

It is not an unprimeable number, because it can be changed into a prime (513145541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16525 + ... + 36046.

It is an arithmetic number, because the mean of its divisors is an integer number (65925288).

Almost surely, 2^513145531 is an apocalyptic number.

513145531 is a deficient number, since it is larger than the sum of its proper divisors (14256773).

513145531 is a wasteful number, since it uses less digits than its factorization.

513145531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52841.

The product of its digits is 4500, while the sum is 28.

The square root of 513145531 is about 22652.7157533043. The cubic root of 513145531 is about 800.5961863211.

Adding to 513145531 its reverse (135541315), we get a palindrome (648686846).

The spelling of 513145531 in words is "five hundred thirteen million, one hundred forty-five thousand, five hundred thirty-one".