213501242 has 8 divisors (see below), whose sum is σ = 320428116. Its totient is φ = 106691872.

The previous prime is 213501241. The next prime is 213501257. The reversal of 213501242 is 242105312.

It can be written as a sum of positive squares in 2 ways, for example, as 203946961 + 9554281 = 14281^2 + 3091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213501241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24683 + ... + 32190.

Almost surely, 2^213501242 is an apocalyptic number.

213501242 is a deficient number, since it is larger than the sum of its proper divisors (106926874).

213501242 is a wasteful number, since it uses less digits than its factorization.

213501242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58752.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 213501242 is about 14611.6816965057. The cubic root of 213501242 is about 597.6773556591.

Adding to 213501242 its reverse (242105312), we get a palindrome (455606554).

The spelling of 213501242 in words is "two hundred thirteen million, five hundred one thousand, two hundred forty-two".