51235512 has 16 divisors (see below), whose sum is σ = 128088840. Its totient is φ = 17078496.

The previous prime is 51235511. The next prime is 51235519. The reversal of 51235512 is 21553215.

It is a happy number.

51235512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2134813 = 51235512 / (5 + 1 + 2 + 3 + 5 + 5 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51235511) 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, 1067383 + ... + 1067430.

Almost surely, 2^51235512 is an apocalyptic number.

It is an amenable number.

51235512 is an abundant number, since it is smaller than the sum of its proper divisors (76853328).

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

51235512 is a wasteful number, since it uses less digits than its factorization.

51235512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134822 (or 2134818 counting only the distinct ones).

The product of its digits is 1500, while the sum is 24.

The square root of 51235512 is about 7157.8985743024. The cubic root of 51235512 is about 371.4129369018.

Adding to 51235512 its reverse (21553215), we get a palindrome (72788727).

The spelling of 51235512 in words is "fifty-one million, two hundred thirty-five thousand, five hundred twelve".