203661452513 has 2 divisors, whose sum is σ = 203661452514. Its totient is φ = 203661452512.

The previous prime is 203661452473. The next prime is 203661452551. The reversal of 203661452513 is 315254166302.

It is an a-pointer prime, because the next prime (203661452551) can be obtained adding 203661452513 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157844906209 + 45816546304 = 397297^2 + 214048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203661452513 is a prime.

It is not a weakly prime, because it can be changed into another prime (203661452413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101830726256 + 101830726257.

It is an arithmetic number, because the mean of its divisors is an integer number (101830726257).

Almost surely, 2^203661452513 is an apocalyptic number.

It is an amenable number.

203661452513 is a deficient number, since it is larger than the sum of its proper divisors (1).

203661452513 is an equidigital number, since it uses as much as digits as its factorization.

203661452513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 203661452513 in words is "two hundred three billion, six hundred sixty-one million, four hundred fifty-two thousand, five hundred thirteen".