51782918 has 48 divisors (see below), whose sum is σ = 92906352. Its totient is φ = 21542400.

The previous prime is 51782917. The next prime is 51782963. The reversal of 51782918 is 81928715.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51782911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168521 + ... + 168827.

It is an arithmetic number, because the mean of its divisors is an integer number (1935549).

Almost surely, 2^51782918 is an apocalyptic number.

51782918 is a deficient number, since it is larger than the sum of its proper divisors (41123434).

51782918 is a wasteful number, since it uses less digits than its factorization.

51782918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 378 counting only the distinct ones).

The product of its digits is 40320, while the sum is 41.

The square root of 51782918 is about 7196.0348804046. The cubic root of 51782918 is about 372.7309931632.

The spelling of 51782918 in words is "fifty-one million, seven hundred eighty-two thousand, nine hundred eighteen".