2198523 has 4 divisors (see below), whose sum is σ = 2931368. Its totient is φ = 1465680.

The previous prime is 2198513. The next prime is 2198527. The reversal of 2198523 is 3258912.

It is a happy number.

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

It is not a de Polignac number, because 2198523 - 2⁴ = 2198507 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2198527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366418 + ... + 366423.

It is an arithmetic number, because the mean of its divisors is an integer number (732842).

2^2198523 is an apocalyptic number.

2198523 is a deficient number, since it is larger than the sum of its proper divisors (732845).

2198523 is an equidigital number, since it uses as much as digits as its factorization.

2198523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732844.

The product of its digits is 4320, while the sum is 30.

The square root of 2198523 is about 1482.7417172252. The cubic root of 2198523 is about 130.0300325091.

The spelling of 2198523 in words is "two million, one hundred ninety-eight thousand, five hundred twenty-three".