243453131 has 4 divisors (see below), whose sum is σ = 243632592. Its totient is φ = 243273672.

The previous prime is 243453109. The next prime is 243453167. The reversal of 243453131 is 131354342.

243453131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 243453131 - 2¹⁰ = 243452107 is a prime.

It is a super-2 number, since 2×243453131² = 118538853987406322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243453131.

It is not an unprimeable number, because it can be changed into a prime (243450131) 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, 87680 + ... + 90413.

It is an arithmetic number, because the mean of its divisors is an integer number (60908148).

Almost surely, 2^243453131 is an apocalyptic number.

243453131 is a deficient number, since it is larger than the sum of its proper divisors (179461).

243453131 is a wasteful number, since it uses less digits than its factorization.

243453131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179460.

The product of its digits is 4320, while the sum is 26.

The square root of 243453131 is about 15602.9846824253. The cubic root of 243453131 is about 624.4127869154.

The spelling of 243453131 in words is "two hundred forty-three million, four hundred fifty-three thousand, one hundred thirty-one".