51761636 has 12 divisors (see below), whose sum is σ = 93706620. Its totient is φ = 24988320.

The previous prime is 51761623. The next prime is 51761653. The reversal of 51761636 is 63616715.

It is a happy number.

51761636 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 2 ways, for example, as 25300900 + 26460736 = 5030^2 + 5144^2 .

It is a super-2 number, since 2×51761636² = 5358533922792992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51761596 and 51761605.

It is an unprimeable number.

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, 222995 + ... + 223226.

It is an arithmetic number, because the mean of its divisors is an integer number (7808885).

Almost surely, 2^51761636 is an apocalyptic number.

It is an amenable number.

51761636 is a deficient number, since it is larger than the sum of its proper divisors (41944984).

51761636 is a wasteful number, since it uses less digits than its factorization.

51761636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446254 (or 446252 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 51761636 is about 7194.5559974192. Note that the first 3 decimals coincide. The cubic root of 51761636 is about 372.6799238900.

The spelling of 51761636 in words is "fifty-one million, seven hundred sixty-one thousand, six hundred thirty-six".