201787247243 has 2 divisors, whose sum is σ = 201787247244. Its totient is φ = 201787247242.

The previous prime is 201787247219. The next prime is 201787247269. The reversal of 201787247243 is 342742787102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201787247243 - 2¹⁴ = 201787230859 is a prime.

It is a super-2 number, since 2×201787247243² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201787247213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100893623621 + 100893623622.

It is an arithmetic number, because the mean of its divisors is an integer number (100893623622).

Almost surely, 2^201787247243 is an apocalyptic number.

201787247243 is a deficient number, since it is larger than the sum of its proper divisors (1).

201787247243 is an equidigital number, since it uses as much as digits as its factorization.

201787247243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1053696, while the sum is 47.

The spelling of 201787247243 in words is "two hundred one billion, seven hundred eighty-seven million, two hundred forty-seven thousand, two hundred forty-three".