215135042 has 8 divisors (see below), whose sum is σ = 322807356. Its totient is φ = 107532592.

The previous prime is 215134999. The next prime is 215135047. The reversal of 215135042 is 240531512.

It can be written as a sum of positive squares in 2 ways, for example, as 214358881 + 776161 = 14641^2 + 881^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 215134999 and 215135017.

It is not an unprimeable number, because it can be changed into a prime (215135047) by changing a digit.

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, 8933 + ... + 22584.

Almost surely, 2^215135042 is an apocalyptic number.

215135042 is a deficient number, since it is larger than the sum of its proper divisors (107672314).

215135042 is a wasteful number, since it uses less digits than its factorization.

215135042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34932.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 215135042 is about 14667.4824697356. The cubic root of 215135042 is about 599.1980415449.

Adding to 215135042 its reverse (240531512), we get a palindrome (455666554).

The spelling of 215135042 in words is "two hundred fifteen million, one hundred thirty-five thousand, forty-two".