213287340 has 48 divisors (see below), whose sum is σ = 682520832. Its totient is φ = 48751296.

The previous prime is 213287309. The next prime is 213287357. The reversal of 213287340 is 43782312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 213287298 and 213287307.

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 15 ways as a sum of consecutive naturals, for example, 253494 + ... + 254333.

It is an arithmetic number, because the mean of its divisors is an integer number (14219184).

Almost surely, 2^213287340 is an apocalyptic number.

213287340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213287340 is an abundant number, since it is smaller than the sum of its proper divisors (469233492).

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

213287340 is a wasteful number, since it uses less digits than its factorization.

213287340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507846 (or 507844 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 213287340 is about 14604.3603077985. The cubic root of 213287340 is about 597.4776892167.

The spelling of 213287340 in words is "two hundred thirteen million, two hundred eighty-seven thousand, three hundred forty".