102020252549 has 2 divisors, whose sum is σ = 102020252550. Its totient is φ = 102020252548.

The previous prime is 102020252501. The next prime is 102020252591. The reversal of 102020252549 is 945252020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77962691524 + 24057561025 = 279218^2 + 155105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102020252549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020252599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010126274 + 51010126275.

It is an arithmetic number, because the mean of its divisors is an integer number (51010126275).

Almost surely, 2^102020252549 is an apocalyptic number.

It is an amenable number.

102020252549 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020252549 is an equidigital number, since it uses as much as digits as its factorization.

102020252549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 102020252549 in words is "one hundred two billion, twenty million, two hundred fifty-two thousand, five hundred forty-nine".