243152331 has 4 divisors (see below), whose sum is σ = 324203112. Its totient is φ = 162101552.

The previous prime is 243152317. The next prime is 243152333. The reversal of 243152331 is 133251342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243152331 - 2⁶ = 243152267 is a prime.

It is a super-2 number, since 2×243152331² = 118246112141467122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243152333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40525386 + ... + 40525391.

It is an arithmetic number, because the mean of its divisors is an integer number (81050778).

Almost surely, 2^243152331 is an apocalyptic number.

243152331 is a deficient number, since it is larger than the sum of its proper divisors (81050781).

243152331 is an equidigital number, since it uses as much as digits as its factorization.

243152331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81050780.

The product of its digits is 2160, while the sum is 24.

The square root of 243152331 is about 15593.3425217302. The cubic root of 243152331 is about 624.1555152534.

The spelling of 243152331 in words is "two hundred forty-three million, one hundred fifty-two thousand, three hundred thirty-one".