243561461 has 8 divisors (see below), whose sum is σ = 286142304. Its totient is φ = 204387120.

The previous prime is 243561427. The next prime is 243561463. The reversal of 243561461 is 164165342.

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 243561461 - 2¹⁸ = 243299317 is a prime.

It is a super-4 number, since 4×243561461⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243561463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851471 + ... + 851756.

It is an arithmetic number, because the mean of its divisors is an integer number (35767788).

Almost surely, 2^243561461 is an apocalyptic number.

It is an amenable number.

243561461 is a deficient number, since it is larger than the sum of its proper divisors (42580843).

243561461 is a wasteful number, since it uses less digits than its factorization.

243561461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703251.

The product of its digits is 17280, while the sum is 32.

The square root of 243561461 is about 15606.4557475424. The cubic root of 243561461 is about 624.5053887321.

The spelling of 243561461 in words is "two hundred forty-three million, five hundred sixty-one thousand, four hundred sixty-one".