51218467 has 8 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 47414400.

The previous prime is 51218443. The next prime is 51218473. The reversal of 51218467 is 76481215.

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

It is a cyclic number.

It is not a de Polignac number, because 51218467 - 2⁷ = 51218339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51215467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23659 + ... + 25732.

It is an arithmetic number, because the mean of its divisors is an integer number (6890184).

Almost surely, 2^51218467 is an apocalyptic number.

51218467 is a deficient number, since it is larger than the sum of its proper divisors (3903005).

51218467 is a wasteful number, since it uses less digits than its factorization.

51218467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49469.

The product of its digits is 13440, while the sum is 34.

The square root of 51218467 is about 7156.7078325163. The cubic root of 51218467 is about 371.3717451878.

The spelling of 51218467 in words is "fifty-one million, two hundred eighteen thousand, four hundred sixty-seven".