51949636 has 6 divisors (see below), whose sum is σ = 90911870. Its totient is φ = 25974816.

The previous prime is 51949621. The next prime is 51949649. The reversal of 51949636 is 63694915.

It can be written as a sum of positive squares in only one way, i.e., 45158400 + 6791236 = 6720^2 + 2606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51949592 and 51949601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6493701 + ... + 6493708.

Almost surely, 2^51949636 is an apocalyptic number.

It is an amenable number.

51949636 is a deficient number, since it is larger than the sum of its proper divisors (38962234).

51949636 is a wasteful number, since it uses less digits than its factorization.

51949636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987413 (or 12987411 counting only the distinct ones).

The product of its digits is 174960, while the sum is 43.

The square root of 51949636 is about 7207.6095898710. The cubic root of 51949636 is about 373.1305740698.

The spelling of 51949636 in words is "fifty-one million, nine hundred forty-nine thousand, six hundred thirty-six".