513740581 has 8 divisors (see below), whose sum is σ = 539495424. Its totient is φ = 488270640.

The previous prime is 513740573. The next prime is 513740603. The reversal of 513740581 is 185047315.

It is a happy number.

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 513740581 - 2³ = 513740573 is a prime.

It is a super-2 number, since 2×513740581² = 527858769132435122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513740681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67525 + ... + 74746.

It is an arithmetic number, because the mean of its divisors is an integer number (67436928).

Almost surely, 2^513740581 is an apocalyptic number.

It is an amenable number.

513740581 is a deficient number, since it is larger than the sum of its proper divisors (25754843).

513740581 is a wasteful number, since it uses less digits than its factorization.

513740581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142451.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 513740581 is about 22665.8461346582. The cubic root of 513740581 is about 800.9055272430.

Adding to 513740581 its reverse (185047315), we get a palindrome (698787896).

The spelling of 513740581 in words is "five hundred thirteen million, seven hundred forty thousand, five hundred eighty-one".