2196381 has 32 divisors (see below), whose sum is σ = 3502080. Its totient is φ = 1209600.

The previous prime is 2196377. The next prime is 2196401. The reversal of 2196381 is 1836912.

It is not a de Polignac number, because 2196381 - 2² = 2196377 is a prime.

It is a super-2 number, since 2×2196381² = 9648178994322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19381 + ... + 19493.

It is an arithmetic number, because the mean of its divisors is an integer number (109440).

2^2196381 is an apocalyptic number.

It is an amenable number.

2196381 is a deficient number, since it is larger than the sum of its proper divisors (1305699).

2196381 is a wasteful number, since it uses less digits than its factorization.

2196381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177.

The product of its digits is 2592, while the sum is 30.

The square root of 2196381 is about 1482.0192306445. The cubic root of 2196381 is about 129.9877897802.

The spelling of 2196381 in words is "two million, one hundred ninety-six thousand, three hundred eighty-one".