201255556553 has 2 divisors, whose sum is σ = 201255556554. Its totient is φ = 201255556552.

The previous prime is 201255556511. The next prime is 201255556561. The reversal of 201255556553 is 355655552102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178655846329 + 22599710224 = 422677^2 + 150332^2 .

It is a cyclic number.

It is not a de Polignac number, because 201255556553 - 2⁸ = 201255556297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (209255556553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100627778276 + 100627778277.

It is an arithmetic number, because the mean of its divisors is an integer number (100627778277).

Almost surely, 2^201255556553 is an apocalyptic number.

It is an amenable number.

201255556553 is a deficient number, since it is larger than the sum of its proper divisors (1).

201255556553 is an equidigital number, since it uses as much as digits as its factorization.

201255556553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125000, while the sum is 44.

The spelling of 201255556553 in words is "two hundred one billion, two hundred fifty-five million, five hundred fifty-six thousand, five hundred fifty-three".