201453521 has 2 divisors, whose sum is σ = 201453522. Its totient is φ = 201453520.

The previous prime is 201453491. The next prime is 201453569. The reversal of 201453521 is 125354102.

201453521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 98227921 = 10160^2 + 9911^2 .

It is a cyclic number.

It is not a de Polignac number, because 201453521 - 2¹⁸ = 201191377 is a prime.

It is a super-2 number, since 2×201453521² = 81167042246594882, which contains 22 as substring.

It is equal to p_11155037 and since 201453521 and 11155037 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (201452521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100726760 + 100726761.

It is an arithmetic number, because the mean of its divisors is an integer number (100726761).

Almost surely, 2^201453521 is an apocalyptic number.

It is an amenable number.

201453521 is a deficient number, since it is larger than the sum of its proper divisors (1).

201453521 is an equidigital number, since it uses as much as digits as its factorization.

201453521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 201453521 is about 14193.4323192102. The cubic root of 201453521 is about 586.2168364726.

It can be divided in two parts, 20 and 1453521, that added together give a palindrome (1453541).

The spelling of 201453521 in words is "two hundred one million, four hundred fifty-three thousand, five hundred twenty-one".