51011099 has 4 divisors (see below), whose sum is σ = 51025464. Its totient is φ = 50996736.

The previous prime is 51011071. The next prime is 51011113. The reversal of 51011099 is 99011015.

It is a happy number.

51011099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51011099 - 2²⁴ = 34233883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51011699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2459 + ... + 10395.

It is an arithmetic number, because the mean of its divisors is an integer number (12756366).

Almost surely, 2^51011099 is an apocalyptic number.

51011099 is a deficient number, since it is larger than the sum of its proper divisors (14365).

51011099 is an equidigital number, since it uses as much as digits as its factorization.

51011099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14364.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 51011099 is about 7142.2054717013. The cubic root of 51011099 is about 370.8698768459.

The spelling of 51011099 in words is "fifty-one million, eleven thousand, ninety-nine".