201481481 has 2 divisors, whose sum is σ = 201481482. Its totient is φ = 201481480.

The previous prime is 201481477. The next prime is 201481487. The reversal of 201481481 is 184184102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195552256 + 5929225 = 13984^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 201481481 - 2² = 201481477 is a prime.

It is a super-2 number, since 2×201481481² = 81189574371906722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201481487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100740740 + 100740741.

It is an arithmetic number, because the mean of its divisors is an integer number (100740741).

Almost surely, 2^201481481 is an apocalyptic number.

It is an amenable number.

201481481 is a deficient number, since it is larger than the sum of its proper divisors (1).

201481481 is an equidigital number, since it uses as much as digits as its factorization.

201481481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 201481481 is about 14194.4172476365. The cubic root of 201481481 is about 586.2439558208.

The spelling of 201481481 in words is "two hundred one million, four hundred eighty-one thousand, four hundred eighty-one".