201095551 has 2 divisors, whose sum is σ = 201095552. Its totient is φ = 201095550.

The previous prime is 201095539. The next prime is 201095579. The reversal of 201095551 is 155590102.

It is an a-pointer prime, because the next prime (201095579) can be obtained adding 201095551 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201095551 - 2¹⁵ = 201062783 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201098551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100547775 + 100547776.

It is an arithmetic number, because the mean of its divisors is an integer number (100547776).

Almost surely, 2^201095551 is an apocalyptic number.

201095551 is a deficient number, since it is larger than the sum of its proper divisors (1).

201095551 is an equidigital number, since it uses as much as digits as its factorization.

201095551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 201095551 is about 14180.8163023149. The cubic root of 201095551 is about 585.8694073514.

The spelling of 201095551 in words is "two hundred one million, ninety-five thousand, five hundred fifty-one".