243151553009 has 2 divisors, whose sum is σ = 243151553010. Its totient is φ = 243151553008.

The previous prime is 243151552957. The next prime is 243151553081. The reversal of 243151553009 is 900355151342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204724576225 + 38426976784 = 452465^2 + 196028^2 .

It is a cyclic number.

It is not a de Polignac number, because 243151553009 - 2⁸ = 243151552753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (243151553209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121575776504 + 121575776505.

It is an arithmetic number, because the mean of its divisors is an integer number (121575776505).

Almost surely, 2^243151553009 is an apocalyptic number.

It is an amenable number.

243151553009 is a deficient number, since it is larger than the sum of its proper divisors (1).

243151553009 is an equidigital number, since it uses as much as digits as its factorization.

243151553009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 243151553009 in words is "two hundred forty-three billion, one hundred fifty-one million, five hundred fifty-three thousand, nine".