243150553 has 2 divisors, whose sum is σ = 243150554. Its totient is φ = 243150552.

The previous prime is 243150539. The next prime is 243150559. The reversal of 243150553 is 355051342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236759769 + 6390784 = 15387^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 243150553 - 2⁵ = 243150521 is a prime.

It is not a weakly prime, because it can be changed into another prime (243150559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121575276 + 121575277.

It is an arithmetic number, because the mean of its divisors is an integer number (121575277).

Almost surely, 2^243150553 is an apocalyptic number.

It is an amenable number.

243150553 is a deficient number, since it is larger than the sum of its proper divisors (1).

243150553 is an equidigital number, since it uses as much as digits as its factorization.

243150553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 243150553 is about 15593.2855101162. The cubic root of 243150553 is about 624.1539939146.

The spelling of 243150553 in words is "two hundred forty-three million, one hundred fifty thousand, five hundred fifty-three".