51108216 has 16 divisors (see below), whose sum is σ = 127770600. Its totient is φ = 17036064.

The previous prime is 51108199. The next prime is 51108217. The reversal of 51108216 is 61280115.

It is a super-2 number, since 2×51108216² = 5224099485405312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2129509 = 51108216 / (5 + 1 + 1 + 0 + 8 + 2 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51108217) 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, 1064731 + ... + 1064778.

Almost surely, 2^51108216 is an apocalyptic number.

It is an amenable number.

51108216 is an abundant number, since it is smaller than the sum of its proper divisors (76662384).

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

51108216 is a wasteful number, since it uses less digits than its factorization.

51108216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129518 (or 2129514 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 51108216 is about 7149.0010490977. The cubic root of 51108216 is about 371.1050866814.

The spelling of 51108216 in words is "fifty-one million, one hundred eight thousand, two hundred sixteen".