51113732 has 6 divisors (see below), whose sum is σ = 89449038. Its totient is φ = 25556864.

The previous prime is 51113731. The next prime is 51113737. The reversal of 51113732 is 23731115.

51113732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33339076 + 17774656 = 5774^2 + 4216^2 .

It is a super-2 number, since 2×51113732² = 5225227197935648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51113698 and 51113707.

It is not an unprimeable number, because it can be changed into a prime (51113731) 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 as a sum of consecutive naturals, namely, 6389213 + ... + 6389220.

It is an arithmetic number, because the mean of its divisors is an integer number (14908173).

Almost surely, 2^51113732 is an apocalyptic number.

It is an amenable number.

51113732 is a deficient number, since it is larger than the sum of its proper divisors (38335306).

51113732 is a wasteful number, since it uses less digits than its factorization.

51113732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12778437 (or 12778435 counting only the distinct ones).

The product of its digits is 630, while the sum is 23.

The square root of 51113732 is about 7149.3868268545. The cubic root of 51113732 is about 371.1184370595.

Adding to 51113732 its reverse (23731115), we get a palindrome (74844847).

The spelling of 51113732 in words is "fifty-one million, one hundred thirteen thousand, seven hundred thirty-two".