213240284 has 6 divisors (see below), whose sum is σ = 373170504. Its totient is φ = 106620140.

The previous prime is 213240283. The next prime is 213240329. The reversal of 213240284 is 482042312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213240281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26655032 + ... + 26655039.

It is an arithmetic number, because the mean of its divisors is an integer number (62195084).

Almost surely, 2^213240284 is an apocalyptic number.

It is an amenable number.

213240284 is a deficient number, since it is larger than the sum of its proper divisors (159930220).

213240284 is a wasteful number, since it uses less digits than its factorization.

213240284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53310075 (or 53310073 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 213240284 is about 14602.7491932170. The cubic root of 213240284 is about 597.4337469649.

Adding to 213240284 its reverse (482042312), we get a palindrome (695282596).

The spelling of 213240284 in words is "two hundred thirteen million, two hundred forty thousand, two hundred eighty-four".