2195231 has 4 divisors (see below), whose sum is σ = 2203272. Its totient is φ = 2187192.

The previous prime is 2195201. The next prime is 2195233. The reversal of 2195231 is 1325912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2195231 is a prime.

It is a super-2 number, since 2×2195231² = 9638078286722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2195197 and 2195206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3596 + ... + 4161.

It is an arithmetic number, because the mean of its divisors is an integer number (550818).

2^2195231 is an apocalyptic number.

2195231 is a deficient number, since it is larger than the sum of its proper divisors (8041).

2195231 is an equidigital number, since it uses as much as digits as its factorization.

2195231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040.

The product of its digits is 540, while the sum is 23.

The square root of 2195231 is about 1481.6311956759. The cubic root of 2195231 is about 129.9650991123.

The spelling of 2195231 in words is "two million, one hundred ninety-five thousand, two hundred thirty-one".