215153330026 has 4 divisors (see below), whose sum is σ = 322729995042. Its totient is φ = 107576665012.

The previous prime is 215153329973. The next prime is 215153330033. The reversal of 215153330026 is 620033351512.

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

It can be written as a sum of positive squares in only one way, i.e., 175602064401 + 39551265625 = 419049^2 + 198875^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215153330026.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53788332505 + ... + 53788332508.

Almost surely, 2^215153330026 is an apocalyptic number.

215153330026 is a deficient number, since it is larger than the sum of its proper divisors (107576665016).

215153330026 is a wasteful number, since it uses less digits than its factorization.

215153330026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107576665015.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 215153330026 its reverse (620033351512), we get a palindrome (835186681538).

The spelling of 215153330026 in words is "two hundred fifteen billion, one hundred fifty-three million, three hundred thirty thousand, twenty-six".