201265381 has 2 divisors, whose sum is σ = 201265382. Its totient is φ = 201265380.

The previous prime is 201265373. The next prime is 201265403. The reversal of 201265381 is 183562102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104734756 + 96530625 = 10234^2 + 9825^2 .

It is a cyclic number.

It is not a de Polignac number, because 201265381 - 2³ = 201265373 is a prime.

It is a super-2 number, since 2×201265381² = 81015507178150322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201266381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100632690 + 100632691.

It is an arithmetic number, because the mean of its divisors is an integer number (100632691).

Almost surely, 2^201265381 is an apocalyptic number.

It is an amenable number.

201265381 is a deficient number, since it is larger than the sum of its proper divisors (1).

201265381 is an equidigital number, since it uses as much as digits as its factorization.

201265381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 201265381 is about 14186.8030577717. The cubic root of 201265381 is about 586.0342878515.

The spelling of 201265381 in words is "two hundred one million, two hundred sixty-five thousand, three hundred eighty-one".