503218530 has 48 divisors (see below), whose sum is σ = 1385335224. Its totient is φ = 126297600.

The previous prime is 503218511. The next prime is 503218559. The reversal of 503218530 is 35812305.

It can be written as a sum of positive squares in 4 ways, for example, as 295599249 + 207619281 = 17193^2 + 14409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 503218494 and 503218503.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162921 + ... + 165980.

Almost surely, 2^503218530 is an apocalyptic number.

503218530 is an abundant number, since it is smaller than the sum of its proper divisors (882116694).

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

503218530 is a wasteful number, since it uses less digits than its factorization.

503218530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328931 (or 328928 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 503218530 is about 22432.5328485216. The cubic root of 503218530 is about 795.3999174577.

The spelling of 503218530 in words is "five hundred three million, two hundred eighteen thousand, five hundred thirty".