22198493 has 2 divisors, whose sum is σ = 22198494. Its totient is φ = 22198492.

The previous prime is 22198489. The next prime is 22198513. The reversal of 22198493 is 39489122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 2679769 = 4418^2 + 1637^2 .

It is a cyclic number.

It is not a de Polignac number, because 22198493 - 2² = 22198489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22198453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11099246 + 11099247.

It is an arithmetic number, because the mean of its divisors is an integer number (11099247).

Almost surely, 2^22198493 is an apocalyptic number.

It is an amenable number.

22198493 is a deficient number, since it is larger than the sum of its proper divisors (1).

22198493 is an equidigital number, since it uses as much as digits as its factorization.

22198493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 22198493 is about 4711.5276715732. The cubic root of 22198493 is about 281.0441161216.

The spelling of 22198493 in words is "twenty-two million, one hundred ninety-eight thousand, four hundred ninety-three".