1331211663 has 12 divisors (see below), whose sum is σ = 1923584208. Its totient is φ = 887140800.

The previous prime is 1331211647. The next prime is 1331211667. The reversal of 1331211663 is 3661121331.

It is not a de Polignac number, because 1331211663 - 2⁴ = 1331211647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331211667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1195 + ... + 51612.

It is an arithmetic number, because the mean of its divisors is an integer number (160298684).

Almost surely, 2^1331211663 is an apocalyptic number.

1331211663 is a deficient number, since it is larger than the sum of its proper divisors (592372545).

1331211663 is a wasteful number, since it uses less digits than its factorization.

1331211663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55614 (or 55611 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1331211663 is about 36485.7734329423. The cubic root of 1331211663 is about 1100.0583062758.

Adding to 1331211663 its reverse (3661121331), we get a palindrome (4992332994).

The spelling of 1331211663 in words is "one billion, three hundred thirty-one million, two hundred eleven thousand, six hundred sixty-three".