243430000537 has 2 divisors, whose sum is σ = 243430000538. Its totient is φ = 243430000536.

The previous prime is 243430000501. The next prime is 243430000543. The reversal of 243430000537 is 735000034342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188290037776 + 55139962761 = 433924^2 + 234819^2 .

It is a cyclic number.

It is not a de Polignac number, because 243430000537 - 2⁷ = 243430000409 is a prime.

It is a super-2 number, since 2×243430000537² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243430000499 and 243430000508.

It is not a weakly prime, because it can be changed into another prime (243430000577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121715000268 + 121715000269.

It is an arithmetic number, because the mean of its divisors is an integer number (121715000269).

Almost surely, 2^243430000537 is an apocalyptic number.

It is an amenable number.

243430000537 is a deficient number, since it is larger than the sum of its proper divisors (1).

243430000537 is an equidigital number, since it uses as much as digits as its factorization.

243430000537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 31.

Adding to 243430000537 its reverse (735000034342), we get a palindrome (978430034879).

The spelling of 243430000537 in words is "two hundred forty-three billion, four hundred thirty million, five hundred thirty-seven", and thus it is an aban number.