51021622 has 8 divisors (see below), whose sum is σ = 76662000. Its totient is φ = 25467624.

The previous prime is 51021601. The next prime is 51021637. The reversal of 51021622 is 22612015.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51021622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20097 + ... + 22492.

It is an arithmetic number, because the mean of its divisors is an integer number (9582750).

Almost surely, 2^51021622 is an apocalyptic number.

51021622 is a deficient number, since it is larger than the sum of its proper divisors (25640378).

51021622 is a wasteful number, since it uses less digits than its factorization.

51021622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43190.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 51021622 is about 7142.9421109232. The cubic root of 51021622 is about 370.8953771486.

Adding to 51021622 its reverse (22612015), we get a palindrome (73633637).

It can be divided in two parts, 5102 and 1622, that added together give a square (6724 = 82²).

The spelling of 51021622 in words is "fifty-one million, twenty-one thousand, six hundred twenty-two".