51217873 has 8 divisors (see below), whose sum is σ = 58619840. Its totient is φ = 43837200.

The previous prime is 51217871. The next prime is 51217891. The reversal of 51217873 is 37871215.

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 51217873 - 2¹ = 51217871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51217871) 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, 223 + ... + 10123.

It is an arithmetic number, because the mean of its divisors is an integer number (7327480).

Almost surely, 2^51217873 is an apocalyptic number.

It is an amenable number.

51217873 is a deficient number, since it is larger than the sum of its proper divisors (7401967).

51217873 is an equidigital number, since it uses as much as digits as its factorization.

51217873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10647.

The product of its digits is 11760, while the sum is 34.

The square root of 51217873 is about 7156.6663328676. Note that the first 3 decimals coincide. The cubic root of 51217873 is about 371.3703095359.

The spelling of 51217873 in words is "fifty-one million, two hundred seventeen thousand, eight hundred seventy-three".