513883561 has 3 divisors (see below), whose sum is σ = 513906231.
Its totient is φ = 513860892.
The previous prime is 513883541. The next prime is 513883609. The reversal of 513883561 is 165388315.
The square root of 513883561 is 22669.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in only one way, i.e., 498673561 + 15210000 = 22331^2 + 3900^2
It is not a de Polignac number, because 513883561 - 217 = 513752489 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (513883511) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11335 + ... + 34003.
It is an arithmetic number, because the mean of its divisors is an integer number (171302077).
Almost surely, 2513883561 is an apocalyptic number.
513883561 is the 22669-th square number.
513883561 is the 11335-th centered octagonal number.
It is an amenable number.
513883561 is a deficient number, since it is larger than the sum of its proper divisors (22670).
513883561 is an frugal number, since it uses more digits than its factorization.
513883561 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 45338 (or 22669 counting only the distinct ones).
The product of its digits is 86400, while the sum is 40.
The cubic root of 513883561 is about 800.9798208032.
The spelling of 513883561 in words is "five hundred thirteen million, eight hundred eighty-three thousand, five hundred sixty-one".