2115100550551 has 2 divisors, whose sum is σ = 2115100550552. Its totient is φ = 2115100550550.

The previous prime is 2115100550513. The next prime is 2115100550561. The reversal of 2115100550551 is 1550550015112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2115100550551 - 2¹⁷ = 2115100419479 is a prime.

It is a super-2 number, since 2×2115100550551² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115100550561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057550275275 + 1057550275276.

It is an arithmetic number, because the mean of its divisors is an integer number (1057550275276).

Almost surely, 2^{2115100550551} is an apocalyptic number.

2115100550551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115100550551 is an equidigital number, since it uses as much as digits as its factorization.

2115100550551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6250, while the sum is 31.

Adding to 2115100550551 its reverse (1550550015112), we get a palindrome (3665650565663).

The spelling of 2115100550551 in words is "two trillion, one hundred fifteen billion, one hundred million, five hundred fifty thousand, five hundred fifty-one".