2015566 has 24 divisors (see below), whose sum is σ = 3566376. Its totient is φ = 851760.

The previous prime is 2015557. The next prime is 2015567. The reversal of 2015566 is 6655102.

It is a self number, because there is not a number n which added to its sum of digits gives 2015566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015567) 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 11 ways as a sum of consecutive naturals, for example, 12760 + ... + 12916.

It is an arithmetic number, because the mean of its divisors is an integer number (148599).

2^2015566 is an apocalyptic number.

2015566 is a deficient number, since it is larger than the sum of its proper divisors (1550810).

2015566 is a wasteful number, since it uses less digits than its factorization.

2015566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 297 counting only the distinct ones).

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

The square root of 2015566 is about 1419.7063076566. The cubic root of 2015566 is about 126.3181261568.

The spelling of 2015566 in words is "two million, fifteen thousand, five hundred sixty-six".