51826866 has 64 divisors (see below), whose sum is σ = 133152768. Its totient is φ = 13071168.

The previous prime is 51826847. The next prime is 51826867. The reversal of 51826866 is 66862815.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51826867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10495 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (2080512).

Almost surely, 2^51826866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51826866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66576384).

51826866 is an abundant number, since it is smaller than the sum of its proper divisors (81325902).

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

51826866 is a wasteful number, since it uses less digits than its factorization.

51826866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175.

The product of its digits is 138240, while the sum is 42.

The square root of 51826866 is about 7199.0878588888. The cubic root of 51826866 is about 372.8364085549.

The spelling of 51826866 in words is "fifty-one million, eight hundred twenty-six thousand, eight hundred sixty-six".