51507836 has 6 divisors (see below), whose sum is σ = 90138720. Its totient is φ = 25753916.

The previous prime is 51507829. The next prime is 51507839. The reversal of 51507836 is 63870515.

It is a junction number, because it is equal to n+sod(n) for n = 51507796 and 51507805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51507839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6438476 + ... + 6438483.

It is an arithmetic number, because the mean of its divisors is an integer number (15023120).

Almost surely, 2^51507836 is an apocalyptic number.

It is an amenable number.

51507836 is a deficient number, since it is larger than the sum of its proper divisors (38630884).

51507836 is a wasteful number, since it uses less digits than its factorization.

51507836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12876963 (or 12876961 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 51507836 is about 7176.8959864276. The cubic root of 51507836 is about 372.0698119258.

The spelling of 51507836 in words is "fifty-one million, five hundred seven thousand, eight hundred thirty-six".