201623155 has 8 divisors (see below), whose sum is σ = 254682000. Its totient is φ = 152809056.

The previous prime is 201623143. The next prime is 201623161. The reversal of 201623155 is 551326102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201623155 - 2¹¹ = 201621107 is a prime.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1061080 + ... + 1061269.

It is an arithmetic number, because the mean of its divisors is an integer number (31835250).

Almost surely, 2^201623155 is an apocalyptic number.

201623155 is a deficient number, since it is larger than the sum of its proper divisors (53058845).

201623155 is a wasteful number, since it uses less digits than its factorization.

201623155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122373.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 201623155 is about 14199.4068538091. The cubic root of 201623155 is about 586.3813316667.

Adding to 201623155 its reverse (551326102), we get a palindrome (752949257).

The spelling of 201623155 in words is "two hundred one million, six hundred twenty-three thousand, one hundred fifty-five".