213032240 has 20 divisors (see below), whose sum is σ = 495300144. Its totient is φ = 85212864.

The previous prime is 213032227. The next prime is 213032251. The reversal of 213032240 is 42230312.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 1331372 + ... + 1331531.

Almost surely, 2^213032240 is an apocalyptic number.

213032240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213032240 is an abundant number, since it is smaller than the sum of its proper divisors (282267904).

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

213032240 is a wasteful number, since it uses less digits than its factorization.

213032240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662916 (or 2662910 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 213032240 is about 14595.6240017342. The cubic root of 213032240 is about 597.2393919596.

Adding to 213032240 its reverse (42230312), we get a palindrome (255262552).

The spelling of 213032240 in words is "two hundred thirteen million, thirty-two thousand, two hundred forty".