201525161 has 2 divisors, whose sum is σ = 201525162. Its totient is φ = 201525160.

The previous prime is 201525131. The next prime is 201525169. The reversal of 201525161 is 161525102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180768025 + 20757136 = 13445^2 + 4556^2 .

It is a cyclic number.

It is not a de Polignac number, because 201525161 - 2²² = 197330857 is a prime.

It is a super-2 number, since 2×201525161² = 81224781032151842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201525169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100762580 + 100762581.

It is an arithmetic number, because the mean of its divisors is an integer number (100762581).

Almost surely, 2^201525161 is an apocalyptic number.

It is an amenable number.

201525161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201525161 is an equidigital number, since it uses as much as digits as its factorization.

201525161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 201525161 is about 14195.9557973389. The cubic root of 201525161 is about 586.2863175068.

The spelling of 201525161 in words is "two hundred one million, five hundred twenty-five thousand, one hundred sixty-one".