201131663 has 4 divisors (see below), whose sum is σ = 211717560. Its totient is φ = 190545768.

The previous prime is 201131657. The next prime is 201131677. The reversal of 201131663 is 366131102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201131663 - 2⁴ = 201131647 is a prime.

It is a super-2 number, since 2×201131663² = 80907891722291138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5292920 + ... + 5292957.

It is an arithmetic number, because the mean of its divisors is an integer number (52929390).

Almost surely, 2^201131663 is an apocalyptic number.

201131663 is a deficient number, since it is larger than the sum of its proper divisors (10585897).

201131663 is a wasteful number, since it uses less digits than its factorization.

201131663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10585896.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 201131663 is about 14182.0895145955. The cubic root of 201131663 is about 585.9044746774.

Adding to 201131663 its reverse (366131102), we get a palindrome (567262765).

The spelling of 201131663 in words is "two hundred one million, one hundred thirty-one thousand, six hundred sixty-three".