2162281 has 16 divisors (see below), whose sum is σ = 2585088. Its totient is φ = 1785600.

The previous prime is 2162273. The next prime is 2162297. The reversal of 2162281 is 1822612.

2162281 = 1² + 2² + ... + 186².

It is not a de Polignac number, because 2162281 - 2³ = 2162273 is a prime.

It is a super-2 number, since 2×2162281² = 9350918245922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162221) 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, 5611 + ... + 5983.

It is an arithmetic number, because the mean of its divisors is an integer number (161568).

2^2162281 is an apocalyptic number.

It is an amenable number.

2162281 is a deficient number, since it is larger than the sum of its proper divisors (422807).

2162281 is a wasteful number, since it uses less digits than its factorization.

2162281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432.

The product of its digits is 384, while the sum is 22.

The square root of 2162281 is about 1470.4696528660. The cubic root of 2162281 is about 129.3115678527.

Adding to 2162281 its reverse (1822612), we get a palindrome (3984893).

The spelling of 2162281 in words is "two million, one hundred sixty-two thousand, two hundred eighty-one".