215430222155 has 32 divisors (see below), whose sum is σ = 281012674560. Its totient is φ = 157943468160.

The previous prime is 215430222149. The next prime is 215430222173. The reversal of 215430222155 is 551222034512.

It is not a de Polignac number, because 215430222155 - 2¹⁰ = 215430221131 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8135597 + ... + 8162033.

It is an arithmetic number, because the mean of its divisors is an integer number (8781646080).

Almost surely, 2^215430222155 is an apocalyptic number.

215430222155 is a deficient number, since it is larger than the sum of its proper divisors (65582452405).

215430222155 is a wasteful number, since it uses less digits than its factorization.

215430222155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29259.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 215430222155 its reverse (551222034512), we get a palindrome (766652256667).

The spelling of 215430222155 in words is "two hundred fifteen billion, four hundred thirty million, two hundred twenty-two thousand, one hundred fifty-five".