243115150221 has 8 divisors (see below), whose sum is σ = 360170592960. Its totient is φ = 162076766796.

The previous prime is 243115150097. The next prime is 243115150241. The reversal of 243115150221 is 122051511342.

It is a happy number.

243115150221 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 151 + 502 + 2 + 1 = 666.

It is not a de Polignac number, because 243115150221 - 2¹⁴ = 243115133837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9004264823 = 243115150221 / (2 + 4 + 3 + 1 + 1 + 5 + 1 + 5 + 0 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243115150241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4502132385 + ... + 4502132438.

It is an arithmetic number, because the mean of its divisors is an integer number (45021324120).

Almost surely, 2^243115150221 is an apocalyptic number.

It is an amenable number.

243115150221 is a deficient number, since it is larger than the sum of its proper divisors (117055442739).

243115150221 is an equidigital number, since it uses as much as digits as its factorization.

243115150221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9004264832 (or 9004264826 counting only the distinct ones).

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

Adding to 243115150221 its reverse (122051511342), we get a palindrome (365166661563).

The spelling of 243115150221 in words is "two hundred forty-three billion, one hundred fifteen million, one hundred fifty thousand, two hundred twenty-one".