201223453 has 4 divisors (see below), whose sum is σ = 204634080. Its totient is φ = 197812828.

The previous prime is 201223439. The next prime is 201223487. The reversal of 201223453 is 354322102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201223453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201223853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705225 + ... + 1705342.

It is an arithmetic number, because the mean of its divisors is an integer number (51158520).

Almost surely, 2^201223453 is an apocalyptic number.

It is an amenable number.

201223453 is a deficient number, since it is larger than the sum of its proper divisors (3410627).

201223453 is an equidigital number, since it uses as much as digits as its factorization.

201223453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410626.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 201223453 is about 14185.3252694466. The cubic root of 201223453 is about 585.9935904202.

Adding to 201223453 its reverse (354322102), we get a palindrome (555545555).

The spelling of 201223453 in words is "two hundred one million, two hundred twenty-three thousand, four hundred fifty-three".