243102131 has 4 divisors (see below), whose sum is σ = 255897000. Its totient is φ = 230307264.

The previous prime is 243102061. The next prime is 243102133. The reversal of 243102131 is 131201342.

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 243102131 - 2²⁶ = 175993267 is a prime.

It is a super-2 number, since 2×243102131² = 118197292193482322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243102133) 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, 6397406 + ... + 6397443.

It is an arithmetic number, because the mean of its divisors is an integer number (63974250).

Almost surely, 2^243102131 is an apocalyptic number.

243102131 is a deficient number, since it is larger than the sum of its proper divisors (12794869).

243102131 is a wasteful number, since it uses less digits than its factorization.

243102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794868.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 243102131 is about 15591.7327773407. The cubic root of 243102131 is about 624.1125589672.

Adding to 243102131 its reverse (131201342), we get a palindrome (374303473).

The spelling of 243102131 in words is "two hundred forty-three million, one hundred two thousand, one hundred thirty-one".