51918582 has 16 divisors (see below), whose sum is σ = 103909680. Its totient is φ = 17294112.

The previous prime is 51918551. The next prime is 51918589. The reversal of 51918582 is 28581915.

It is a self number, because there is not a number n which added to its sum of digits gives 51918582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51918589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12144 + ... + 15852.

It is an arithmetic number, because the mean of its divisors is an integer number (6494355).

Almost surely, 2^51918582 is an apocalyptic number.

51918582 is an abundant number, since it is smaller than the sum of its proper divisors (51991098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51918582 is a wasteful number, since it uses less digits than its factorization.

51918582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047.

The product of its digits is 28800, while the sum is 39.

The square root of 51918582 is about 7205.4550168605. The cubic root of 51918582 is about 373.0562103377.

The spelling of 51918582 in words is "fifty-one million, nine hundred eighteen thousand, five hundred eighty-two".