201651139 has 2 divisors, whose sum is σ = 201651140. Its totient is φ = 201651138.

The previous prime is 201651113. The next prime is 201651157. The reversal of 201651139 is 931156102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201651139 - 2¹⁹ = 201126851 is a prime.

It is equal to p_11165329 and since 201651139 and 11165329 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 (201658139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100825569 + 100825570.

It is an arithmetic number, because the mean of its divisors is an integer number (100825570).

Almost surely, 2^201651139 is an apocalyptic number.

201651139 is a deficient number, since it is larger than the sum of its proper divisors (1).

201651139 is an equidigital number, since it uses as much as digits as its factorization.

201651139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 201651139 is about 14200.3922128933. The cubic root of 201651139 is about 586.4084590669.

The spelling of 201651139 in words is "two hundred one million, six hundred fifty-one thousand, one hundred thirty-nine".