2115120551 has 2 divisors, whose sum is σ = 2115120552. Its totient is φ = 2115120550.

The previous prime is 2115120541. The next prime is 2115120589. The reversal of 2115120551 is 1550215112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2115120551 - 2²² = 2110926247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115120541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057560275 + 1057560276.

It is an arithmetic number, because the mean of its divisors is an integer number (1057560276).

Almost surely, 2^2115120551 is an apocalyptic number.

2115120551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115120551 is an equidigital number, since it uses as much as digits as its factorization.

2115120551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 2115120551 is about 45990.4397782844. The cubic root of 2115120551 is about 1283.6453196766.

Adding to 2115120551 its reverse (1550215112), we get a palindrome (3665335663).

The spelling of 2115120551 in words is "two billion, one hundred fifteen million, one hundred twenty thousand, five hundred fifty-one".