51817472 has 44 divisors (see below), whose sum is σ = 118398480. Its totient is φ = 22204416.

The previous prime is 51817471. The next prime is 51817483. The reversal of 51817472 is 27471815.

It is not an unprimeable number, because it can be changed into a prime (51817471) 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, 3554 + ... + 10782.

Almost surely, 2^51817472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51817472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59199240).

51817472 is an abundant number, since it is smaller than the sum of its proper divisors (66581008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51817472 is an equidigital number, since it uses as much as digits as its factorization.

51817472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256 (or 7238 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 51817472 is about 7198.4353855543. The cubic root of 51817472 is about 372.8138807482.

The spelling of 51817472 in words is "fifty-one million, eight hundred seventeen thousand, four hundred seventy-two".