215123442155 has 8 divisors (see below), whose sum is σ = 258153521472. Its totient is φ = 172095159808.

The previous prime is 215123442109. The next prime is 215123442169. The reversal of 215123442155 is 551244321512.

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

It is a cyclic number.

It is not a de Polignac number, because 215123442155 - 2¹⁶ = 215123376619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170099 + ... + 677628.

It is an arithmetic number, because the mean of its divisors is an integer number (32269190184).

Almost surely, 2^215123442155 is an apocalyptic number.

215123442155 is a deficient number, since it is larger than the sum of its proper divisors (43030079317).

215123442155 is an equidigital number, since it uses as much as digits as its factorization.

215123442155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898485.

The product of its digits is 48000, while the sum is 35.

Adding to 215123442155 its reverse (551244321512), we get a palindrome (766367763667).

The spelling of 215123442155 in words is "two hundred fifteen billion, one hundred twenty-three million, four hundred forty-two thousand, one hundred fifty-five".