2162881 has 8 divisors (see below), whose sum is σ = 2514240. Its totient is φ = 1822128.

The previous prime is 2162879. The next prime is 2162899. The reversal of 2162881 is 1882612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2162881 - 2¹ = 2162879 is a prime.

It is a super-2 number, since 2×2162881² = 9356108440322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2162821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2206 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (314280).

2^2162881 is an apocalyptic number.

It is an amenable number.

2162881 is a deficient number, since it is larger than the sum of its proper divisors (351359).

2162881 is an equidigital number, since it uses as much as digits as its factorization.

2162881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303.

The product of its digits is 1536, while the sum is 28.

The square root of 2162881 is about 1470.6736551662. The cubic root of 2162881 is about 129.3235274093.

The spelling of 2162881 in words is "two million, one hundred sixty-two thousand, eight hundred eighty-one".