201501481 has 2 divisors, whose sum is σ = 201501482. Its totient is φ = 201501480.

The previous prime is 201501467. The next prime is 201501499. The reversal of 201501481 is 184105102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179024400 + 22477081 = 13380^2 + 4741^2 .

It is a cyclic number.

It is not a de Polignac number, because 201501481 - 2¹³ = 201493289 is a prime.

It is a super-2 number, since 2×201501481² = 81205693690386722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201501281) 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, 100750740 + 100750741.

It is an arithmetic number, because the mean of its divisors is an integer number (100750741).

Almost surely, 2^201501481 is an apocalyptic number.

It is an amenable number.

201501481 is a deficient number, since it is larger than the sum of its proper divisors (1).

201501481 is an equidigital number, since it uses as much as digits as its factorization.

201501481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 201501481 is about 14195.1217324826. The cubic root of 201501481 is about 586.2633529570.

Adding to 201501481 its reverse (184105102), we get a palindrome (385606583).

The spelling of 201501481 in words is "two hundred one million, five hundred one thousand, four hundred eighty-one".