243151212105 has 12 divisors (see below), whose sum is σ = 421462101060. Its totient is φ = 129680646432.

The previous prime is 243151212103. The next prime is 243151212121. The reversal of 243151212105 is 501212151342.

It is a happy number.

243151212105 is a `hidden beast` number, since 2 + 4 + 31 + 512 + 12 + 105 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49513370256 + 193637841849 = 222516^2 + 440043^2 .

It is not a de Polignac number, because 243151212105 - 2¹ = 243151212103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243151212103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2701680090 + ... + 2701680179.

It is an arithmetic number, because the mean of its divisors is an integer number (35121841755).

Almost surely, 2^243151212105 is an apocalyptic number.

It is an amenable number.

243151212105 is a deficient number, since it is larger than the sum of its proper divisors (178310888955).

243151212105 is a wasteful number, since it uses less digits than its factorization.

243151212105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403360280 (or 5403360277 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 243151212105 its reverse (501212151342), we get a palindrome (744363363447).

The spelling of 243151212105 in words is "two hundred forty-three billion, one hundred fifty-one million, two hundred twelve thousand, one hundred five".