1331013306 has 32 divisors (see below), whose sum is σ = 3058098048. Its totient is φ = 378316800.

The previous prime is 1331013301. The next prime is 1331013329. The reversal of 1331013306 is 6033101331.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1331013301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73995 + ... + 90206.

It is an arithmetic number, because the mean of its divisors is an integer number (95565564).

Almost surely, 2^1331013306 is an apocalyptic number.

1331013306 is an abundant number, since it is smaller than the sum of its proper divisors (1727084742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331013306 is a wasteful number, since it uses less digits than its factorization.

1331013306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164406.

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 1331013306 is about 36483.0550529969. The cubic root of 1331013306 is about 1100.0036655525.

Adding to 1331013306 its reverse (6033101331), we get a palindrome (7364114637).

The spelling of 1331013306 in words is "one billion, three hundred thirty-one million, thirteen thousand, three hundred six".