2143522 has 4 divisors (see below), whose sum is σ = 3215286. Its totient is φ = 1071760.

The previous prime is 2143517. The next prime is 2143541. The reversal of 2143522 is 2253412.

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

It can be written as a sum of positive squares in only one way, i.e., 1874161 + 269361 = 1369^2 + 519^2 .

It is a super-4 number, since 4×2143522⁴ (a number of 26 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2143522.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535879 + ... + 535882.

2^2143522 is an apocalyptic number.

2143522 is a deficient number, since it is larger than the sum of its proper divisors (1071764).

2143522 is a wasteful number, since it uses less digits than its factorization.

2143522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071763.

The product of its digits is 480, while the sum is 19.

The square root of 2143522 is about 1464.0771837577. The cubic root of 2143522 is about 128.9365310839.

Adding to 2143522 its reverse (2253412), we get a palindrome (4396934).

The spelling of 2143522 in words is "two million, one hundred forty-three thousand, five hundred twenty-two".