243660131 has 16 divisors (see below), whose sum is σ = 288465408. Its totient is φ = 202893600.

The previous prime is 243660127. The next prime is 243660149. The reversal of 243660131 is 131066342.

It is not a de Polignac number, because 243660131 - 2² = 243660127 is a prime.

It is a super-2 number, since 2×243660131² = 118740518877874322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243660131.

It is not an unprimeable number, because it can be changed into a prime (243660101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12230 + ... + 25236.

It is an arithmetic number, because the mean of its divisors is an integer number (18029088).

Almost surely, 2^243660131 is an apocalyptic number.

243660131 is a deficient number, since it is larger than the sum of its proper divisors (44805277).

243660131 is a wasteful number, since it uses less digits than its factorization.

243660131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13162.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 243660131 is about 15609.6166192511. The cubic root of 243660131 is about 624.5897091706.

The spelling of 243660131 in words is "two hundred forty-three million, six hundred sixty thousand, one hundred thirty-one".