201561512239 has 2 divisors, whose sum is σ = 201561512240. Its totient is φ = 201561512238.

The previous prime is 201561512171. The next prime is 201561512249. The reversal of 201561512239 is 932215165102.

201561512239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201561512239 - 2⁷ = 201561512111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201561512198 and 201561512207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201561512249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100780756119 + 100780756120.

It is an arithmetic number, because the mean of its divisors is an integer number (100780756120).

Almost surely, 2^201561512239 is an apocalyptic number.

201561512239 is a deficient number, since it is larger than the sum of its proper divisors (1).

201561512239 is an equidigital number, since it uses as much as digits as its factorization.

201561512239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 201561512239 in words is "two hundred one billion, five hundred sixty-one million, five hundred twelve thousand, two hundred thirty-nine".