51493418 has 16 divisors (see below), whose sum is σ = 81890304. Its totient is φ = 24241680.

The previous prime is 51493399. The next prime is 51493423. The reversal of 51493418 is 81439415.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8930 + ... + 13517.

It is an arithmetic number, because the mean of its divisors is an integer number (5118144).

Almost surely, 2^51493418 is an apocalyptic number.

51493418 is a deficient number, since it is larger than the sum of its proper divisors (30396886).

51493418 is a wasteful number, since it uses less digits than its factorization.

51493418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22517.

The product of its digits is 17280, while the sum is 35.

The square root of 51493418 is about 7175.8914428801. The cubic root of 51493418 is about 372.0350922690.

The spelling of 51493418 in words is "fifty-one million, four hundred ninety-three thousand, four hundred eighteen".