2115624 has 64 divisors (see below), whose sum is σ = 6192000. Its totient is φ = 602112.

The previous prime is 2115571. The next prime is 2115629. The reversal of 2115624 is 4265112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2115624.

It is not an unprimeable number, because it can be changed into a prime (2115629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8104 + ... + 8360.

It is an arithmetic number, because the mean of its divisors is an integer number (96750).

2^2115624 is an apocalyptic number.

2115624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3096000).

2115624 is an abundant number, since it is smaller than the sum of its proper divisors (4076376).

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

2115624 is a wasteful number, since it uses less digits than its factorization.

2115624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 269 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 2115624 is about 1454.5184770226. The cubic root of 2115624 is about 128.3747157636.

The spelling of 2115624 in words is "two million, one hundred fifteen thousand, six hundred twenty-four".