243364145 has 16 divisors (see below), whose sum is σ = 295529040. Its totient is φ = 192374784.

The previous prime is 243364139. The next prime is 243364153. The reversal of 243364145 is 541463342.

It can be written as a sum of positive squares in 8 ways, for example, as 60357361 + 183006784 = 7769^2 + 13528^2 .

It is a cyclic number.

It is not a de Polignac number, because 243364145 - 2²² = 239169841 is a prime.

It is a super-2 number, since 2×243364145² = 118452214143162050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321107 + ... + 321863.

It is an arithmetic number, because the mean of its divisors is an integer number (18470565).

Almost surely, 2^243364145 is an apocalyptic number.

It is an amenable number.

243364145 is a deficient number, since it is larger than the sum of its proper divisors (52164895).

243364145 is a wasteful number, since it uses less digits than its factorization.

243364145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

The product of its digits is 34560, while the sum is 32.

The square root of 243364145 is about 15600.1328519984. The cubic root of 243364145 is about 624.3367000354.

The spelling of 243364145 in words is "two hundred forty-three million, three hundred sixty-four thousand, one hundred forty-five".