201649951 has 2 divisors, whose sum is σ = 201649952. Its totient is φ = 201649950.

The previous prime is 201649933. The next prime is 201649961. The reversal of 201649951 is 159946102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201649951 - 2¹⁵ = 201617183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201649951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201649961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100824975 + 100824976.

It is an arithmetic number, because the mean of its divisors is an integer number (100824976).

Almost surely, 2^201649951 is an apocalyptic number.

201649951 is a deficient number, since it is larger than the sum of its proper divisors (1).

201649951 is an equidigital number, since it uses as much as digits as its factorization.

201649951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 201649951 is about 14200.3503830011. The cubic root of 201649951 is about 586.4073074830.

The spelling of 201649951 in words is "two hundred one million, six hundred forty-nine thousand, nine hundred fifty-one".