51211099 has 12 divisors (see below), whose sum is σ = 54522624. Its totient is φ = 48090672.

The previous prime is 51211081. The next prime is 51211109. The reversal of 51211099 is 99011215.

It is not a de Polignac number, because 51211099 - 2⁵ = 51211067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51211019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45289 + ... + 46405.

It is an arithmetic number, because the mean of its divisors is an integer number (4543552).

Almost surely, 2^51211099 is an apocalyptic number.

51211099 is a deficient number, since it is larger than the sum of its proper divisors (3311525).

51211099 is a wasteful number, since it uses less digits than its factorization.

51211099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 51211099 is about 7156.1930521752. The cubic root of 51211099 is about 371.3539365184.

It can be divided in two parts, 512 and 11099, that added together give a palindrome (11611).

The spelling of 51211099 in words is "fifty-one million, two hundred eleven thousand, ninety-nine".