51995718 has 12 divisors (see below), whose sum is σ = 112657428. Its totient is φ = 17331900.

The previous prime is 51995717. The next prime is 51995719. The reversal of 51995718 is 81759915.

It is an interprime number because it is at equal distance from previous prime (51995717) and next prime (51995719).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51995717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1444308 + ... + 1444343.

It is an arithmetic number, because the mean of its divisors is an integer number (9388119).

Almost surely, 2^51995718 is an apocalyptic number.

51995718 is an abundant number, since it is smaller than the sum of its proper divisors (60661710).

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

51995718 is a wasteful number, since it uses less digits than its factorization.

51995718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888659 (or 2888656 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 51995718 is about 7210.8056415355. The cubic root of 51995718 is about 373.2408701359.

The spelling of 51995718 in words is "fifty-one million, nine hundred ninety-five thousand, seven hundred eighteen".