213305988 has 24 divisors (see below), whose sum is σ = 568816192. Its totient is φ = 60944544.

The previous prime is 213305977. The next prime is 213305993. The reversal of 213305988 is 889503312.

It is a super-2 number, since 2×213305988² = 90998889033312288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269595 + ... + 1269762.

Almost surely, 2^213305988 is an apocalyptic number.

213305988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

213305988 is an abundant number, since it is smaller than the sum of its proper divisors (355510204).

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

213305988 is a wasteful number, since it uses less digits than its factorization.

213305988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539371 (or 2539369 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 213305988 is about 14604.9987333105. The cubic root of 213305988 is about 597.4951014695.

The spelling of 213305988 in words is "two hundred thirteen million, three hundred five thousand, nine hundred eighty-eight".