201693525881 has 2 divisors, whose sum is σ = 201693525882. Its totient is φ = 201693525880.

The previous prime is 201693525857. The next prime is 201693525899. The reversal of 201693525881 is 188525396102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102389760256 + 99303765625 = 319984^2 + 315125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201693525881 is a prime.

It is a super-2 number, since 2×201693525881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201693522881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100846762940 + 100846762941.

It is an arithmetic number, because the mean of its divisors is an integer number (100846762941).

Almost surely, 2^201693525881 is an apocalyptic number.

It is an amenable number.

201693525881 is a deficient number, since it is larger than the sum of its proper divisors (1).

201693525881 is an equidigital number, since it uses as much as digits as its factorization.

201693525881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 201693525881 in words is "two hundred one billion, six hundred ninety-three million, five hundred twenty-five thousand, eight hundred eighty-one".