51998976 has 72 divisors (see below), whose sum is σ = 153790560. Its totient is φ = 17330688.

The previous prime is 51998939. The next prime is 51998977. The reversal of 51998976 is 67989915.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (51998977) 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, 3151 + ... + 10673.

It is an arithmetic number, because the mean of its divisors is an integer number (2135980).

Almost surely, 2^51998976 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 51998976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76895280).

51998976 is an abundant number, since it is smaller than the sum of its proper divisors (101791584).

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

51998976 is an equidigital number, since it uses as much as digits as its factorization.

51998976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548 (or 7528 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 51998976 is about 7211.0315489533. The cubic root of 51998976 is about 373.2486656070.

The spelling of 51998976 in words is "fifty-one million, nine hundred ninety-eight thousand, nine hundred seventy-six".