51112521 has 24 divisors (see below), whose sum is σ = 76737024. Its totient is φ = 32748480.

The previous prime is 51112517. The next prime is 51112531. The reversal of 51112521 is 12521115.

51112521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51112521 - 2² = 51112517 is a prime.

It is a super-2 number, since 2×51112521² = 5224979605950882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51112494 and 51112503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51112531) 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 23 ways as a sum of consecutive naturals, for example, 46045 + ... + 47141.

It is an arithmetic number, because the mean of its divisors is an integer number (3197376).

Almost surely, 2^51112521 is an apocalyptic number.

It is an amenable number.

51112521 is a deficient number, since it is larger than the sum of its proper divisors (25624503).

51112521 is a wasteful number, since it uses less digits than its factorization.

51112521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1298 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 51112521 is about 7149.3021337750. The cubic root of 51112521 is about 371.1155061578.

Adding to 51112521 its reverse (12521115), we get a palindrome (63633636).

The spelling of 51112521 in words is "fifty-one million, one hundred twelve thousand, five hundred twenty-one".