1663231201 has 4 divisors (see below), whose sum is σ = 1668908052. Its totient is φ = 1657554352.

The previous prime is 1663231183. The next prime is 1663231217. The reversal of 1663231201 is 1021323661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1624493025 + 38738176 = 40305^2 + 6224^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663231201 - 2²¹ = 1661134049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663231501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837986 + ... + 2838571.

It is an arithmetic number, because the mean of its divisors is an integer number (417227013).

Almost surely, 2^1663231201 is an apocalyptic number.

It is an amenable number.

1663231201 is a deficient number, since it is larger than the sum of its proper divisors (5676851).

1663231201 is an equidigital number, since it uses as much as digits as its factorization.

1663231201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5676850.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1663231201 is about 40782.7316520117. The cubic root of 1663231201 is about 1184.8159021335.

Adding to 1663231201 its reverse (1021323661), we get a palindrome (2684554862).

The spelling of 1663231201 in words is "one billion, six hundred sixty-three million, two hundred thirty-one thousand, two hundred one".