513805220 has 24 divisors (see below), whose sum is σ = 1135780800. Its totient is φ = 194704992.

The previous prime is 513805213. The next prime is 513805223. The reversal of 513805220 is 22508315.

It is a self number, because there is not a number n which added to its sum of digits gives 513805220.

It is not an unprimeable number, because it can be changed into a prime (513805223) 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, 675680 + ... + 676439.

It is an arithmetic number, because the mean of its divisors is an integer number (47324200).

Almost surely, 2^513805220 is an apocalyptic number.

It is an amenable number.

513805220 is an abundant number, since it is smaller than the sum of its proper divisors (621975580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513805220 is a wasteful number, since it uses less digits than its factorization.

513805220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352147 (or 1352145 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 513805220 is about 22667.2720017209. The cubic root of 513805220 is about 800.9391158953.

The spelling of 513805220 in words is "five hundred thirteen million, eight hundred five thousand, two hundred twenty".