51421318 has 8 divisors (see below), whose sum is σ = 83065248. Its totient is φ = 23732904.

The previous prime is 51421313. The next prime is 51421319. The reversal of 51421318 is 81312415.

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

It is a super-3 number, since 3×51421318³ (a number of 24 digits) contains 333 as substring.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 51421292 and 51421301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421313) 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, 988846 + ... + 988897.

It is an arithmetic number, because the mean of its divisors is an integer number (10383156).

Almost surely, 2^51421318 is an apocalyptic number.

51421318 is a deficient number, since it is larger than the sum of its proper divisors (31643930).

51421318 is a wasteful number, since it uses less digits than its factorization.

51421318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977758.

The product of its digits is 960, while the sum is 25.

The square root of 51421318 is about 7170.8659170284. The cubic root of 51421318 is about 371.8613725957.

The spelling of 51421318 in words is "fifty-one million, four hundred twenty-one thousand, three hundred eighteen".