243251401361 has 4 divisors (see below), whose sum is σ = 243252667392. Its totient is φ = 243250135332.

The previous prime is 243251401343. The next prime is 243251401387. The reversal of 243251401361 is 163104152342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243251401361 - 2¹⁴ = 243251384977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243251401301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278705 + ... + 751118.

It is an arithmetic number, because the mean of its divisors is an integer number (60813166848).

Almost surely, 2^243251401361 is an apocalyptic number.

It is an amenable number.

243251401361 is a deficient number, since it is larger than the sum of its proper divisors (1266031).

243251401361 is a wasteful number, since it uses less digits than its factorization.

243251401361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266030.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 243251401361 in words is "two hundred forty-three billion, two hundred fifty-one million, four hundred one thousand, three hundred sixty-one".