51361722 has 32 divisors (see below), whose sum is σ = 115430400. Its totient is φ = 16926624.

The previous prime is 51361703. The next prime is 51361747. The reversal of 51361722 is 22716315.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538 + ... + 10149.

It is an arithmetic number, because the mean of its divisors is an integer number (3607200).

Almost surely, 2^51361722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51361722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57715200).

51361722 is an abundant number, since it is smaller than the sum of its proper divisors (64068678).

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

51361722 is a wasteful number, since it uses less digits than its factorization.

51361722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10787 (or 10781 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 51361722 is about 7166.7092866950. The cubic root of 51361722 is about 371.7176577692.

The spelling of 51361722 in words is "fifty-one million, three hundred sixty-one thousand, seven hundred twenty-two".