243122331 has 8 divisors (see below), whose sum is σ = 324236304. Its totient is φ = 162044960.

The previous prime is 243122311. The next prime is 243122357. The reversal of 243122331 is 133221342.

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 243122331 - 2²⁷ = 108904603 is a prime.

It is a super-2 number, since 2×243122331² = 118216935661747122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243122298 and 243122307.

It is not an unprimeable number, because it can be changed into a prime (243122311) 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, 17161 + ... + 27941.

It is an arithmetic number, because the mean of its divisors is an integer number (40529538).

Almost surely, 2^243122331 is an apocalyptic number.

243122331 is a deficient number, since it is larger than the sum of its proper divisors (81113973).

243122331 is a wasteful number, since it uses less digits than its factorization.

243122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18301.

The product of its digits is 864, while the sum is 21.

The square root of 243122331 is about 15592.3805430730. The cubic root of 243122331 is about 624.1298448770.

Adding to 243122331 its reverse (133221342), we get a palindrome (376343673).

The spelling of 243122331 in words is "two hundred forty-three million, one hundred twenty-two thousand, three hundred thirty-one".