51622660 has 12 divisors (see below), whose sum is σ = 108407628. Its totient is φ = 20649056.

The previous prime is 51622643. The next prime is 51622663. The reversal of 51622660 is 6622615.

It can be written as a sum of positive squares in 2 ways, for example, as 7851204 + 43771456 = 2802^2 + 6616^2 .

It is not an unprimeable number, because it can be changed into a prime (51622663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1290547 + ... + 1290586.

It is an arithmetic number, because the mean of its divisors is an integer number (9033969).

Almost surely, 2^51622660 is an apocalyptic number.

It is an amenable number.

51622660 is an abundant number, since it is smaller than the sum of its proper divisors (56784968).

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

51622660 is a wasteful number, since it uses less digits than its factorization.

51622660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581142 (or 2581140 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 51622660 is about 7184.8910917285. The cubic root of 51622660 is about 372.3460859856.

The spelling of 51622660 in words is "fifty-one million, six hundred twenty-two thousand, six hundred sixty".