51466921 has 8 divisors (see below), whose sum is σ = 56984544. Its totient is φ = 46089120.

The previous prime is 51466907. The next prime is 51466949. The reversal of 51466921 is 12966415.

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

It is not a de Polignac number, because 51466921 - 2¹⁷ = 51335849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51466901) 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 7 ways as a sum of consecutive naturals, for example, 34180 + ... + 35653.

It is an arithmetic number, because the mean of its divisors is an integer number (7123068).

Almost surely, 2^51466921 is an apocalyptic number.

It is an amenable number.

51466921 is a deficient number, since it is larger than the sum of its proper divisors (5517623).

51466921 is a wasteful number, since it uses less digits than its factorization.

51466921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69911.

The product of its digits is 12960, while the sum is 34.

The square root of 51466921 is about 7174.0449538597. The cubic root of 51466921 is about 371.9712685445.

The spelling of 51466921 in words is "fifty-one million, four hundred sixty-six thousand, nine hundred twenty-one".