201528617 has 2 divisors, whose sum is σ = 201528618. Its totient is φ = 201528616.

The previous prime is 201528583. The next prime is 201528619. The reversal of 201528617 is 716825102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186349801 + 15178816 = 13651^2 + 3896^2 .

It is a cyclic number.

It is not a de Polignac number, because 201528617 - 2¹⁸ = 201266473 is a prime.

It is a super-3 number, since 3×201528617³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 201528619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201528619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100764308 + 100764309.

It is an arithmetic number, because the mean of its divisors is an integer number (100764309).

Almost surely, 2^201528617 is an apocalyptic number.

It is an amenable number.

201528617 is a deficient number, since it is larger than the sum of its proper divisors (1).

201528617 is an equidigital number, since it uses as much as digits as its factorization.

201528617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 201528617 is about 14196.0775216255. The cubic root of 201528617 is about 586.2896689393.

The spelling of 201528617 in words is "two hundred one million, five hundred twenty-eight thousand, six hundred seventeen".