213245284 has 24 divisors (see below), whose sum is σ = 448938560. Its totient is φ = 86580576.

The previous prime is 213245269. The next prime is 213245309. The reversal of 213245284 is 482542312.

It is a super-2 number, since 2×213245284² = 90947102296481312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199887 + ... + 200950.

Almost surely, 2^213245284 is an apocalyptic number.

It is an amenable number.

213245284 is an abundant number, since it is smaller than the sum of its proper divisors (235693276).

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

213245284 is a wasteful number, since it uses less digits than its factorization.

213245284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400867 (or 400865 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 213245284 is about 14602.9203928529. The cubic root of 213245284 is about 597.4384164162.

Adding to 213245284 its reverse (482542312), we get a palindrome (695787596).

The spelling of 213245284 in words is "two hundred thirteen million, two hundred forty-five thousand, two hundred eighty-four".