243213417322761 has 16 divisors (see below), whose sum is σ = 328728131994816. Its totient is φ = 159920508289536.

The previous prime is 243213417322709. The next prime is 243213417322789. The reversal of 243213417322761 is 167223714312342.

It is not a de Polignac number, because 243213417322761 - 2²² = 243213413128457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243213417322761.

It is not an unprimeable number, because it can be changed into a prime (243213417322261) 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, 55813201 + ... + 60012833.

It is an arithmetic number, because the mean of its divisors is an integer number (20545508249676).

Almost surely, 2^{243213417322761} is an apocalyptic number.

It is an amenable number.

243213417322761 is a deficient number, since it is larger than the sum of its proper divisors (85514714672055).

243213417322761 is a wasteful number, since it uses less digits than its factorization.

243213417322761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464152.

The product of its digits is 2032128, while the sum is 48.

The spelling of 243213417322761 in words is "two hundred forty-three trillion, two hundred thirteen billion, four hundred seventeen million, three hundred twenty-two thousand, seven hundred sixty-one".