2155124420115 has 16 divisors (see below), whose sum is σ = 3448244672928. Its totient is φ = 1149384490496.

The previous prime is 2155124420047. The next prime is 2155124420131. The reversal of 2155124420115 is 5110244215512.

It is a cyclic number.

It is not a de Polignac number, because 2155124420115 - 2¹⁸ = 2155124157971 is a prime.

It is a super-2 number, since 2×2155124420115² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272827 + ... + 2093963.

It is an arithmetic number, because the mean of its divisors is an integer number (215515292058).

Almost surely, 2^{2155124420115} is an apocalyptic number.

2155124420115 is a deficient number, since it is larger than the sum of its proper divisors (1293120252813).

2155124420115 is a wasteful number, since it uses less digits than its factorization.

2155124420115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900038.

The product of its (nonzero) digits is 16000, while the sum is 33.

Adding to 2155124420115 its reverse (5110244215512), we get a palindrome (7265368635627).

The spelling of 2155124420115 in words is "two trillion, one hundred fifty-five billion, one hundred twenty-four million, four hundred twenty thousand, one hundred fifteen".