51211136 has 16 divisors (see below), whose sum is σ = 102022440. Its totient is φ = 25605504.

The previous prime is 51211117. The next prime is 51211159. The reversal of 51211136 is 63111215.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199916 + ... + 200171.

Almost surely, 2^51211136 is an apocalyptic number.

It is an amenable number.

51211136 is a deficient number, since it is larger than the sum of its proper divisors (50811304).

51211136 is an equidigital number, since it uses as much as digits as its factorization.

51211136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400101 (or 400089 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 51211136 is about 7156.1956373481. The cubic root of 51211136 is about 371.3540259527.

It can be divided in two parts, 51211 and 136, that multiplied together give a palindrome (6964696).

The spelling of 51211136 in words is "fifty-one million, two hundred eleven thousand, one hundred thirty-six".