51115199 has 2 divisors, whose sum is σ = 51115200. Its totient is φ = 51115198.

The previous prime is 51115189. The next prime is 51115231. The reversal of 51115199 is 99151115.

It is an a-pointer prime, because the next prime (51115231) can be obtained adding 51115199 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51115199 - 2¹² = 51111103 is a prime.

It is a super-2 number, since 2×51115199² = 5225527137619202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51115109) 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, 25557599 + 25557600.

It is an arithmetic number, because the mean of its divisors is an integer number (25557600).

Almost surely, 2^51115199 is an apocalyptic number.

51115199 is a deficient number, since it is larger than the sum of its proper divisors (1).

51115199 is an equidigital number, since it uses as much as digits as its factorization.

51115199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2025, while the sum is 32.

The square root of 51115199 is about 7149.4894223294. The cubic root of 51115199 is about 371.1219874788.

The spelling of 51115199 in words is "fifty-one million, one hundred fifteen thousand, one hundred ninety-nine".