201043651 has 2 divisors, whose sum is σ = 201043652. Its totient is φ = 201043650.

The previous prime is 201043637. The next prime is 201043669. The reversal of 201043651 is 156340102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201043651 - 2¹³ = 201035459 is a prime.

It is not a weakly prime, because it can be changed into another prime (201041651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521825 + 100521826.

It is an arithmetic number, because the mean of its divisors is an integer number (100521826).

Almost surely, 2^201043651 is an apocalyptic number.

201043651 is a deficient number, since it is larger than the sum of its proper divisors (1).

201043651 is an equidigital number, since it uses as much as digits as its factorization.

201043651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 201043651 is about 14178.9862472604. The cubic root of 201043651 is about 585.8190013988.

Adding to 201043651 its reverse (156340102), we get a palindrome (357383753).

The spelling of 201043651 in words is "two hundred one million, forty-three thousand, six hundred fifty-one".