51131120 has 40 divisors (see below), whose sum is σ = 119441760. Its totient is φ = 20355840.

The previous prime is 51131107. The next prime is 51131131. The reversal of 51131120 is 2113115.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×51131120² = 5228782864908800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51131095 and 51131104.

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 in 7 ways as a sum of consecutive naturals, for example, 16925 + ... + 19715.

It is an arithmetic number, because the mean of its divisors is an integer number (2986044).

Almost surely, 2^51131120 is an apocalyptic number.

It is an amenable number.

51131120 is an abundant number, since it is smaller than the sum of its proper divisors (68310640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51131120 is a wasteful number, since it uses less digits than its factorization.

51131120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033 (or 3027 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 51131120 is about 7150.6027717948. The cubic root of 51131120 is about 371.1605149613.

Adding to 51131120 its reverse (2113115), we get a palindrome (53244235).

The spelling of 51131120 in words is "fifty-one million, one hundred thirty-one thousand, one hundred twenty".