243213154 has 8 divisors (see below), whose sum is σ = 364886748. Its totient is φ = 121584240.

The previous prime is 243213143. The next prime is 243213181. The reversal of 243213154 is 451312342.

It can be written as a sum of positive squares in 2 ways, for example, as 231496225 + 11716929 = 15215^2 + 3423^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12324 + ... + 25264.

Almost surely, 2^243213154 is an apocalyptic number.

243213154 is a deficient number, since it is larger than the sum of its proper divisors (121673594).

243213154 is a wasteful number, since it uses less digits than its factorization.

243213154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22340.

The product of its digits is 2880, while the sum is 25.

The square root of 243213154 is about 15595.2926872182. The cubic root of 243213154 is about 624.2075537510.

Adding to 243213154 its reverse (451312342), we get a palindrome (694525496).

The spelling of 243213154 in words is "two hundred forty-three million, two hundred thirteen thousand, one hundred fifty-four".