2157219 has 16 divisors (see below), whose sum is σ = 3229600. Its totient is φ = 1423008.

The previous prime is 2157209. The next prime is 2157229. The reversal of 2157219 is 9127512.

It is an interprime number because it is at equal distance from previous prime (2157209) and next prime (2157229).

It is not a de Polignac number, because 2157219 - 2⁵ = 2157187 is a prime.

It is a super-2 number, since 2×2157219² = 9307187627922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2157192 and 2157201.

It is not an unprimeable number, because it can be changed into a prime (2157209) 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, 2577 + ... + 3309.

It is an arithmetic number, because the mean of its divisors is an integer number (201850).

2^2157219 is an apocalyptic number.

2157219 is a deficient number, since it is larger than the sum of its proper divisors (1072381).

2157219 is a wasteful number, since it uses less digits than its factorization.

2157219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 845 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 2157219 is about 1468.7474255297. The cubic root of 2157219 is about 129.2105808829.

2157219 divided by its sum of digits (27) gives a palindrome (79897).

The spelling of 2157219 in words is "two million, one hundred fifty-seven thousand, two hundred nineteen".