243154523473 has 2 divisors, whose sum is σ = 243154523474. Its totient is φ = 243154523472.

The previous prime is 243154523411. The next prime is 243154523477. The reversal of 243154523473 is 374325451342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237102772624 + 6051750849 = 486932^2 + 77793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243154523473 is a prime.

It is not a weakly prime, because it can be changed into another prime (243154523477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121577261736 + 121577261737.

It is an arithmetic number, because the mean of its divisors is an integer number (121577261737).

Almost surely, 2^243154523473 is an apocalyptic number.

It is an amenable number.

243154523473 is a deficient number, since it is larger than the sum of its proper divisors (1).

243154523473 is an equidigital number, since it uses as much as digits as its factorization.

243154523473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 43.

The spelling of 243154523473 in words is "two hundred forty-three billion, one hundred fifty-four million, five hundred twenty-three thousand, four hundred seventy-three".