243121032349 has 16 divisors (see below), whose sum is σ = 277298026992. Its totient is φ = 211161858048.

The previous prime is 243121032313. The next prime is 243121032379. The reversal of 243121032349 is 943230121342.

It can be written as a sum of positive squares in 8 ways, for example, as 4935062500 + 238185969849 = 70250^2 + 488043^2 .

It is a cyclic number.

It is not a de Polignac number, because 243121032349 - 2⁷ = 243121032221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121032379) 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, 693237 + ... + 983269.

It is an arithmetic number, because the mean of its divisors is an integer number (17331126687).

Almost surely, 2^243121032349 is an apocalyptic number.

It is an amenable number.

243121032349 is a deficient number, since it is larger than the sum of its proper divisors (34176994643).

243121032349 is a wasteful number, since it uses less digits than its factorization.

243121032349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293856.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 243121032349 in words is "two hundred forty-three billion, one hundred twenty-one million, thirty-two thousand, three hundred forty-nine".