513804481 has 4 divisors (see below), whose sum is σ = 544028292. Its totient is φ = 483580672.

The previous prime is 513804461. The next prime is 513804491. The reversal of 513804481 is 184408315.

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

It can be written as a sum of positive squares in 2 ways, for example, as 317552400 + 196252081 = 17820^2 + 14009^2 .

It is a cyclic number.

It is not a de Polignac number, because 513804481 - 2⁷ = 513804353 is a prime.

It is a super-2 number, since 2×513804481² = 527990089391358722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513804461) 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, 15111880 + ... + 15111913.

It is an arithmetic number, because the mean of its divisors is an integer number (136007073).

Almost surely, 2^513804481 is an apocalyptic number.

It is an amenable number.

513804481 is a deficient number, since it is larger than the sum of its proper divisors (30223811).

513804481 is a wasteful number, since it uses less digits than its factorization.

513804481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30223810.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 513804481 is about 22667.2557006798. The cubic root of 513804481 is about 800.9387319013.

The spelling of 513804481 in words is "five hundred thirteen million, eight hundred four thousand, four hundred eighty-one".