2051566 has 8 divisors (see below), whose sum is σ = 3357144. Its totient is φ = 932520.

The previous prime is 2051537. The next prime is 2051587. The reversal of 2051566 is 6651502.

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 2051566.

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, 46605 + ... + 46648.

It is an arithmetic number, because the mean of its divisors is an integer number (419643).

2^2051566 is an apocalyptic number.

2051566 is a deficient number, since it is larger than the sum of its proper divisors (1305578).

2051566 is a wasteful number, since it uses less digits than its factorization.

2051566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93266.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2051566 is about 1432.3288728501. The cubic root of 2051566 is about 127.0657480878.

It can be divided in two parts, 205 and 1566, that added together give a palindrome (1771).

The spelling of 2051566 in words is "two million, fifty-one thousand, five hundred sixty-six".