1331215423 has 8 divisors (see below), whose sum is σ = 1393514496. Its totient is φ = 1270126200.

The previous prime is 1331215399. The next prime is 1331215433. The reversal of 1331215423 is 3245121331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331215423 - 2¹³ = 1331207231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331215433) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 300211 + ... + 304612.

It is an arithmetic number, because the mean of its divisors is an integer number (174189312).

Almost surely, 2^1331215423 is an apocalyptic number.

1331215423 is a deficient number, since it is larger than the sum of its proper divisors (62299073).

1331215423 is an equidigital number, since it uses as much as digits as its factorization.

1331215423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604925.

The product of its digits is 2160, while the sum is 25.

The square root of 1331215423 is about 36485.8249598389. The cubic root of 1331215423 is about 1100.0593419777.

Adding to 1331215423 its reverse (3245121331), we get a palindrome (4576336754).

The spelling of 1331215423 in words is "one billion, three hundred thirty-one million, two hundred fifteen thousand, four hundred twenty-three".