51766218 has 96 divisors (see below), whose sum is σ = 137180160. Its totient is φ = 13789440.

The previous prime is 51766199. The next prime is 51766229. The reversal of 51766218 is 81266715.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113046 + ... + 113502.

It is an arithmetic number, because the mean of its divisors is an integer number (1428960).

Almost surely, 2^51766218 is an apocalyptic number.

51766218 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51766218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68590080).

51766218 is an abundant number, since it is smaller than the sum of its proper divisors (85413942).

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

51766218 is a wasteful number, since it uses less digits than its factorization.

51766218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 529 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 51766218 is about 7194.8744255894. The cubic root of 51766218 is about 372.6909202518.

It can be divided in two parts, 51766 and 218, that added together give a square (51984 = 228²).

The spelling of 51766218 in words is "fifty-one million, seven hundred sixty-six thousand, two hundred eighteen".