2155241215 has 8 divisors (see below), whose sum is σ = 2738424240. Its totient is φ = 1622769792.

The previous prime is 2155241201. The next prime is 2155241233. The reversal of 2155241215 is 5121425512.

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 2155241215 - 2²³ = 2146852607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12677805 + ... + 12677974.

It is an arithmetic number, because the mean of its divisors is an integer number (342303030).

Almost surely, 2^2155241215 is an apocalyptic number.

2155241215 is a deficient number, since it is larger than the sum of its proper divisors (583183025).

2155241215 is a wasteful number, since it uses less digits than its factorization.

2155241215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25355801.

The product of its digits is 4000, while the sum is 28.

The square root of 2155241215 is about 46424.5755500252. The cubic root of 2155241215 is about 1291.7108112465.

Adding to 2155241215 its reverse (5121425512), we get a palindrome (7276666727).

The spelling of 2155241215 in words is "two billion, one hundred fifty-five million, two hundred forty-one thousand, two hundred fifteen".