51615836 has 6 divisors (see below), whose sum is σ = 90327720. Its totient is φ = 25807916.

The previous prime is 51615833. The next prime is 51615847. The reversal of 51615836 is 63851615.

It is a junction number, because it is equal to n+sod(n) for n = 51615796 and 51615805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6451976 + ... + 6451983.

It is an arithmetic number, because the mean of its divisors is an integer number (15054620).

Almost surely, 2^51615836 is an apocalyptic number.

It is an amenable number.

51615836 is a deficient number, since it is larger than the sum of its proper divisors (38711884).

51615836 is a wasteful number, since it uses less digits than its factorization.

51615836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12903963 (or 12903961 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 51615836 is about 7184.4161906170. The cubic root of 51615836 is about 372.3296784515.

The spelling of 51615836 in words is "fifty-one million, six hundred fifteen thousand, eight hundred thirty-six".