51136636 has 24 divisors (see below), whose sum is σ = 94114944. Its totient is φ = 24264240.

The previous prime is 51136633. The next prime is 51136637. The reversal of 51136636 is 63663115.

It is a super-2 number, since 2×51136636² = 5229911082792992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51136598 and 51136607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51136633) by changing a digit.

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, 9931 + ... + 14173.

It is an arithmetic number, because the mean of its divisors is an integer number (3921456).

Almost surely, 2^51136636 is an apocalyptic number.

It is an amenable number.

51136636 is a deficient number, since it is larger than the sum of its proper divisors (42978308).

51136636 is a wasteful number, since it uses less digits than its factorization.

51136636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401 (or 4399 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

The square root of 51136636 is about 7150.9884631427. The cubic root of 51136636 is about 371.1738613524.

The spelling of 51136636 in words is "fifty-one million, one hundred thirty-six thousand, six hundred thirty-six".