243011453 has 4 divisors (see below), whose sum is σ = 243182940. Its totient is φ = 242839968.

The previous prime is 243011441. The next prime is 243011471. The reversal of 243011453 is 354110342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354110342 = 2 ⋅177055171.

It can be written as a sum of positive squares in 2 ways, for example, as 5943844 + 237067609 = 2438^2 + 15397^2 .

It is a cyclic number.

It is not a de Polignac number, because 243011453 - 2¹⁶ = 242945917 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 (243011473) 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, 83600 + ... + 86457.

It is an arithmetic number, because the mean of its divisors is an integer number (60795735).

Almost surely, 2^243011453 is an apocalyptic number.

It is an amenable number.

243011453 is a deficient number, since it is larger than the sum of its proper divisors (171487).

243011453 is a wasteful number, since it uses less digits than its factorization.

243011453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171486.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 243011453 is about 15588.8246189378. The cubic root of 243011453 is about 624.0349505476.

Adding to 243011453 its reverse (354110342), we get a palindrome (597121795).

The spelling of 243011453 in words is "two hundred forty-three million, eleven thousand, four hundred fifty-three".