243042020153 has 2 divisors, whose sum is σ = 243042020154. Its totient is φ = 243042020152.

The previous prime is 243042020147. The next prime is 243042020209. The reversal of 243042020153 is 351020240342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155383390969 + 87658629184 = 394187^2 + 296072^2 .

It is a cyclic number.

It is not a de Polignac number, because 243042020153 - 2¹² = 243042016057 is a prime.

It is not a weakly prime, because it can be changed into another prime (243042020113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521010076 + 121521010077.

It is an arithmetic number, because the mean of its divisors is an integer number (121521010077).

Almost surely, 2^243042020153 is an apocalyptic number.

It is an amenable number.

243042020153 is a deficient number, since it is larger than the sum of its proper divisors (1).

243042020153 is an equidigital number, since it uses as much as digits as its factorization.

243042020153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 243042020153 its reverse (351020240342), we get a palindrome (594062260495).

The spelling of 243042020153 in words is "two hundred forty-three billion, forty-two million, twenty thousand, one hundred fifty-three".