2115550131 has 4 divisors (see below), whose sum is σ = 2820733512. Its totient is φ = 1410366752.

The previous prime is 2115550123. The next prime is 2115550187. The reversal of 2115550131 is 1310555112.

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

It is a cyclic number.

It is not a de Polignac number, because 2115550131 - 2³ = 2115550123 is a prime.

It is a super-2 number, since 2×2115550131² = 8951104713548234322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2115550121) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 352591686 + ... + 352591691.

It is an arithmetic number, because the mean of its divisors is an integer number (705183378).

Almost surely, 2^2115550131 is an apocalyptic number.

2115550131 is a deficient number, since it is larger than the sum of its proper divisors (705183381).

2115550131 is an equidigital number, since it uses as much as digits as its factorization.

2115550131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705183380.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 2115550131 is about 45995.1098596362. The cubic root of 2115550131 is about 1283.7322163831.

The spelling of 2115550131 in words is "two billion, one hundred fifteen million, five hundred fifty thousand, one hundred thirty-one".