51960216 has 128 divisors (see below), whose sum is σ = 167362560. Its totient is φ = 13046400.

The previous prime is 51960149. The next prime is 51960221. The reversal of 51960216 is 61206915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56835 + ... + 57741.

It is an arithmetic number, because the mean of its divisors is an integer number (1307520).

Almost surely, 2^51960216 is an apocalyptic number.

51960216 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51960216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83681280).

51960216 is an abundant number, since it is smaller than the sum of its proper divisors (115402344).

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

51960216 is a wasteful number, since it uses less digits than its factorization.

51960216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 51960216 is about 7208.3434990294. The cubic root of 51960216 is about 373.1559027908.

The spelling of 51960216 in words is "fifty-one million, nine hundred sixty thousand, two hundred sixteen".