2152217 has 4 divisors (see below), whose sum is σ = 2278836. Its totient is φ = 2025600.

The previous prime is 2152211. The next prime is 2152219. The reversal of 2152217 is 7122512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1948816 + 203401 = 1396^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152217 - 2⁴ = 2152201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63284 + ... + 63317.

It is an arithmetic number, because the mean of its divisors is an integer number (569709).

2^2152217 is an apocalyptic number.

It is an amenable number.

2152217 is a deficient number, since it is larger than the sum of its proper divisors (126619).

2152217 is a wasteful number, since it uses less digits than its factorization.

2152217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126618.

The product of its digits is 280, while the sum is 20.

The square root of 2152217 is about 1467.0436257999. The cubic root of 2152217 is about 129.1106356123.

Adding to 2152217 its reverse (7122512), we get a palindrome (9274729).

The spelling of 2152217 in words is "two million, one hundred fifty-two thousand, two hundred seventeen".