2172615 has 16 divisors (see below), whose sum is σ = 3496416. Its totient is φ = 1152000.

The previous prime is 2172613. The next prime is 2172619. The reversal of 2172615 is 5162712.

It is not a de Polignac number, because 2172615 - 2¹ = 2172613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3315 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (218526).

2^2172615 is an apocalyptic number.

2172615 is a deficient number, since it is larger than the sum of its proper divisors (1323801).

2172615 is a wasteful number, since it uses less digits than its factorization.

2172615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850.

The product of its digits is 840, while the sum is 24.

The square root of 2172615 is about 1473.9793078602. The cubic root of 2172615 is about 129.5172430243.

The spelling of 2172615 in words is "two million, one hundred seventy-two thousand, six hundred fifteen".