201530741 has 2 divisors, whose sum is σ = 201530742. Its totient is φ = 201530740.

The previous prime is 201530737. The next prime is 201530743. The reversal of 201530741 is 147035102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146918641 + 54612100 = 12121^2 + 7390^2 .

It is a cyclic number.

It is not a de Polignac number, because 201530741 - 2² = 201530737 is a prime.

It is a super-2 number, since 2×201530741² = 81229279136018162, which contains 22 as substring.

Together with 201530743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201530743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100765370 + 100765371.

It is an arithmetic number, because the mean of its divisors is an integer number (100765371).

Almost surely, 2^201530741 is an apocalyptic number.

It is an amenable number.

201530741 is a deficient number, since it is larger than the sum of its proper divisors (1).

201530741 is an equidigital number, since it uses as much as digits as its factorization.

201530741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 201530741 is about 14196.1523308254. The cubic root of 201530741 is about 586.2917286549.

Adding to 201530741 its reverse (147035102), we get a palindrome (348565843).

The spelling of 201530741 in words is "two hundred one million, five hundred thirty thousand, seven hundred forty-one".