51949216 has 24 divisors (see below), whose sum is σ = 111573504. Its totient is φ = 23613120.

The previous prime is 51949213. The next prime is 51949243. The reversal of 51949216 is 61294915.

It is not an unprimeable number, because it can be changed into a prime (51949213) 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 3 ways as a sum of consecutive naturals, for example, 73440 + ... + 74143.

It is an arithmetic number, because the mean of its divisors is an integer number (4648896).

Almost surely, 2^51949216 is an apocalyptic number.

It is an amenable number.

51949216 is an abundant number, since it is smaller than the sum of its proper divisors (59624288).

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

51949216 is a wasteful number, since it uses less digits than its factorization.

51949216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147604 (or 147596 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 51949216 is about 7207.5804539388. The cubic root of 51949216 is about 373.1295685109.

The spelling of 51949216 in words is "fifty-one million, nine hundred forty-nine thousand, two hundred sixteen".