215205011006 has 4 divisors (see below), whose sum is σ = 322807516512. Its totient is φ = 107602505502.

The previous prime is 215205010907. The next prime is 215205011023. The reversal of 215205011006 is 600110502512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×215205011006² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53801252750 + ... + 53801252753.

It is an arithmetic number, because the mean of its divisors is an integer number (80701879128).

Almost surely, 2^215205011006 is an apocalyptic number.

215205011006 is a deficient number, since it is larger than the sum of its proper divisors (107602505506).

215205011006 is a wasteful number, since it uses less digits than its factorization.

215205011006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107602505505.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 215205011006 its reverse (600110502512), we get a palindrome (815315513518).

The spelling of 215205011006 in words is "two hundred fifteen billion, two hundred five million, eleven thousand, six".