213240232 has 8 divisors (see below), whose sum is σ = 399825450. Its totient is φ = 106620112.

The previous prime is 213240149. The next prime is 213240281. The reversal of 213240232 is 232042312.

213240232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 183494116 + 29746116 = 13546^2 + 5454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13327507 + ... + 13327522.

Almost surely, 2^213240232 is an apocalyptic number.

It is an amenable number.

213240232 is a deficient number, since it is larger than the sum of its proper divisors (186585218).

213240232 is a wasteful number, since it uses less digits than its factorization.

213240232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26655035 (or 26655031 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 213240232 is about 14602.7474127302. The cubic root of 213240232 is about 597.4336984022.

Adding to 213240232 its reverse (232042312), we get a palindrome (445282544).

The spelling of 213240232 in words is "two hundred thirteen million, two hundred forty thousand, two hundred thirty-two".