1331144156 has 12 divisors (see below), whose sum is σ = 2331795480. Its totient is φ = 664916880.

The previous prime is 1331144147. The next prime is 1331144173. The reversal of 1331144156 is 6514411331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159215 + ... + 167366.

It is an arithmetic number, because the mean of its divisors is an integer number (194316290).

Almost surely, 2^1331144156 is an apocalyptic number.

It is an amenable number.

1331144156 is a deficient number, since it is larger than the sum of its proper divisors (1000651324).

1331144156 is a wasteful number, since it uses less digits than its factorization.

1331144156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327604 (or 327602 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1331144156 is about 36484.8483072083. The cubic root of 1331144156 is about 1100.0397109631.

Adding to 1331144156 its reverse (6514411331), we get a palindrome (7845555487).

The spelling of 1331144156 in words is "one billion, three hundred thirty-one million, one hundred forty-four thousand, one hundred fifty-six".