2193431 has 4 divisors (see below), whose sum is σ = 2223552. Its totient is φ = 2163312.

The previous prime is 2193421. The next prime is 2193439. The reversal of 2193431 is 1343912.

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-2193431 is a prime.

It is a super-2 number, since 2×2193431² = 9622279103522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 9² + 3¹² + 4⁸ + 3¹³ + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2193397 and 2193406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193439) 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, 14951 + ... + 15096.

It is an arithmetic number, because the mean of its divisors is an integer number (555888).

2^2193431 is an apocalyptic number.

2193431 is a deficient number, since it is larger than the sum of its proper divisors (30121).

2193431 is an equidigital number, since it uses as much as digits as its factorization.

2193431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30120.

The product of its digits is 648, while the sum is 23.

The square root of 2193431 is about 1481.0236324921. The cubic root of 2193431 is about 129.9295673699.

The spelling of 2193431 in words is "two million, one hundred ninety-three thousand, four hundred thirty-one".