243541461 has 4 divisors (see below), whose sum is σ = 324721952. Its totient is φ = 162360972.

The previous prime is 243541409. The next prime is 243541471. The reversal of 243541461 is 164145342.

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 not a de Polignac number, because 243541461 - 2¹⁴ = 243525077 is a prime.

It is a super-3 number, since 3×243541461³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243541471) 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, 40590241 + ... + 40590246.

It is an arithmetic number, because the mean of its divisors is an integer number (81180488).

Almost surely, 2^243541461 is an apocalyptic number.

It is an amenable number.

243541461 is a deficient number, since it is larger than the sum of its proper divisors (81180491).

243541461 is an equidigital number, since it uses as much as digits as its factorization.

243541461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81180490.

The product of its digits is 11520, while the sum is 30.

The square root of 243541461 is about 15605.8149739128. The cubic root of 243541461 is about 624.4882945531.

The spelling of 243541461 in words is "two hundred forty-three million, five hundred forty-one thousand, four hundred sixty-one".