243451251502121 has 8 divisors (see below), whose sum is σ = 262178459781000. Its totient is φ = 224724070213632.

The previous prime is 243451251502103. The next prime is 243451251502171. The reversal of 243451251502121 is 121205152154342.

It can be written as a sum of positive squares in 4 ways, for example, as 3314078252521 + 240137173249600 = 1820461^2 + 15496360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243451251502121 - 2⁶ = 243451251502057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243451251502171) 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, 14453255 + ... + 26378003.

It is an arithmetic number, because the mean of its divisors is an integer number (32772307472625).

Almost surely, 2^{243451251502121} is an apocalyptic number.

It is an amenable number.

243451251502121 is a deficient number, since it is larger than the sum of its proper divisors (18727208278879).

243451251502121 is a wasteful number, since it uses less digits than its factorization.

243451251502121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13495195.

The product of its (nonzero) digits is 96000, while the sum is 38.

The spelling of 243451251502121 in words is "two hundred forty-three trillion, four hundred fifty-one billion, two hundred fifty-one million, five hundred two thousand, one hundred twenty-one".