2115564 has 72 divisors (see below), whose sum is σ = 5720064. Its totient is φ = 607200.

The previous prime is 2115539. The next prime is 2115571. The reversal of 2115564 is 4655112.

It is a super-2 number, since 2×2115564² = 8951222076192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44989 + ... + 45035.

2^2115564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2860032).

2115564 is an abundant number, since it is smaller than the sum of its proper divisors (3604500).

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

2115564 is a wasteful number, since it uses less digits than its factorization.

2115564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 94 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 2115564 is about 1454.4978514938. The cubic root of 2115564 is about 128.3735021649.

It can be divided in two parts, 211 and 5564, that added together give a palindrome (5775).

The spelling of 2115564 in words is "two million, one hundred fifteen thousand, five hundred sixty-four".