213242132 has 12 divisors (see below), whose sum is σ = 373647540. Its totient is φ = 106485696.

The previous prime is 213242129. The next prime is 213242143. The reversal of 213242132 is 231242312.

It can be written as a sum of positive squares in 2 ways, for example, as 96904336 + 116337796 = 9844^2 + 10786^2 .

It is a congruent number.

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, 30257 + ... + 36632.

It is an arithmetic number, because the mean of its divisors is an integer number (31137295).

Almost surely, 2^213242132 is an apocalyptic number.

It is an amenable number.

213242132 is a deficient number, since it is larger than the sum of its proper divisors (160405408).

213242132 is a wasteful number, since it uses less digits than its factorization.

213242132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67690 (or 67688 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 213242132 is about 14602.8124688363. The cubic root of 213242132 is about 597.4354728026.

Adding to 213242132 its reverse (231242312), we get a palindrome (444484444).

The spelling of 213242132 in words is "two hundred thirteen million, two hundred forty-two thousand, one hundred thirty-two".