51145818 has 8 divisors (see below), whose sum is σ = 102291648. Its totient is φ = 17048604.

The previous prime is 51145811. The next prime is 51145841. The reversal of 51145818 is 81854115.

It is a sphenic number, since it is the product of 3 distinct primes.

51145818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51145811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4262146 + ... + 4262157.

It is an arithmetic number, because the mean of its divisors is an integer number (12786456).

Almost surely, 2^51145818 is an apocalyptic number.

51145818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51145818 is a wasteful number, since it uses less digits than its factorization.

51145818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524308.

The product of its digits is 6400, while the sum is 33.

The square root of 51145818 is about 7151.6304434723. The cubic root of 51145818 is about 371.1960757875.

The spelling of 51145818 in words is "fifty-one million, one hundred forty-five thousand, eight hundred eighteen".