51321722 has 8 divisors (see below), whose sum is σ = 77910336. Its totient is φ = 25351612.

The previous prime is 51321713. The next prime is 51321727. The reversal of 51321722 is 22712315.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×51321722³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51321727) 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, 154418 + ... + 154749.

It is an arithmetic number, because the mean of its divisors is an integer number (9738792).

Almost surely, 2^51321722 is an apocalyptic number.

51321722 is a deficient number, since it is larger than the sum of its proper divisors (26588614).

51321722 is a wasteful number, since it uses less digits than its factorization.

51321722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309252.

The product of its digits is 840, while the sum is 23.

The square root of 51321722 is about 7163.9180620663. The cubic root of 51321722 is about 371.6211360323.

The spelling of 51321722 in words is "fifty-one million, three hundred twenty-one thousand, seven hundred twenty-two".