243134661 has 16 divisors (see below), whose sum is σ = 404172288. Its totient is φ = 126303600.

The previous prime is 243134651. The next prime is 243134687. The reversal of 243134661 is 166431342.

It is not a de Polignac number, because 243134661 - 2⁷ = 243134533 is a prime.

It is a super-2 number, since 2×243134661² = 118228926759169842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243134611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526035 + ... + 526496.

It is an arithmetic number, because the mean of its divisors is an integer number (25260768).

Almost surely, 2^243134661 is an apocalyptic number.

243134661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243134661 is a deficient number, since it is larger than the sum of its proper divisors (161037627).

243134661 is a wasteful number, since it uses less digits than its factorization.

243134661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052552.

The product of its digits is 10368, while the sum is 30.

The square root of 243134661 is about 15592.7759234846. The cubic root of 243134661 is about 624.1403956573.

The spelling of 243134661 in words is "two hundred forty-three million, one hundred thirty-four thousand, six hundred sixty-one".