51406918 has 8 divisors (see below), whose sum is σ = 77232600. Its totient is φ = 25662720.

The previous prime is 51406903. The next prime is 51406919. The reversal of 51406918 is 81960415.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51406919) 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, 18768 + ... + 21331.

It is an arithmetic number, because the mean of its divisors is an integer number (9654075).

Almost surely, 2^51406918 is an apocalyptic number.

51406918 is a deficient number, since it is larger than the sum of its proper divisors (25825682).

51406918 is a wasteful number, since it uses less digits than its factorization.

51406918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40742.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 51406918 is about 7169.8617838840. The cubic root of 51406918 is about 371.8266573978.

The spelling of 51406918 in words is "fifty-one million, four hundred six thousand, nine hundred eighteen".