51243018 has 8 divisors (see below), whose sum is σ = 102486048. Its totient is φ = 17081004.

The previous prime is 51243013. The next prime is 51243041. The reversal of 51243018 is 81034215.

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

51243018 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51243013) 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 3 ways as a sum of consecutive naturals, for example, 4270246 + ... + 4270257.

It is an arithmetic number, because the mean of its divisors is an integer number (12810756).

Almost surely, 2^51243018 is an apocalyptic number.

51243018 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.

51243018 is a wasteful number, since it uses less digits than its factorization.

51243018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540508.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51243018 is about 7158.4228709961. The cubic root of 51243018 is about 371.4310733418.

The spelling of 51243018 in words is "fifty-one million, two hundred forty-three thousand, eighteen".