243155461 has 8 divisors (see below), whose sum is σ = 253310400. Its totient is φ = 233201760.

The previous prime is 243155447. The next prime is 243155491. The reversal of 243155461 is 164551342.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243155461 - 2⁹ = 243154949 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 (243155431) 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 7 ways as a sum of consecutive naturals, for example, 47841 + ... + 52678.

It is an arithmetic number, because the mean of its divisors is an integer number (31663800).

Almost surely, 2^243155461 is an apocalyptic number.

It is an amenable number.

243155461 is a deficient number, since it is larger than the sum of its proper divisors (10154939).

243155461 is a wasteful number, since it uses less digits than its factorization.

243155461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100619.

The product of its digits is 14400, while the sum is 31.

The square root of 243155461 is about 15593.4428847513. The cubic root of 243155461 is about 624.1581934077.

The spelling of 243155461 in words is "two hundred forty-three million, one hundred fifty-five thousand, four hundred sixty-one".