1331613321 has 8 divisors (see below), whose sum is σ = 1776403200. Its totient is φ = 887282832.

The previous prime is 1331613301. The next prime is 1331613373. The reversal of 1331613321 is 1233161331.

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

It is not a de Polignac number, because 1331613321 - 2⁹ = 1331612809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331613291 and 1331613300.

It is not an unprimeable number, because it can be changed into a prime (1331613301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108025 + ... + 119718.

It is an arithmetic number, because the mean of its divisors is an integer number (222050400).

Almost surely, 2^1331613321 is an apocalyptic number.

It is an amenable number.

1331613321 is a deficient number, since it is larger than the sum of its proper divisors (444789879).

1331613321 is a wasteful number, since it uses less digits than its factorization.

1331613321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229695.

The product of its digits is 972, while the sum is 24.

The square root of 1331613321 is about 36491.2773276026. The cubic root of 1331613321 is about 1100.1689330079.

Adding to 1331613321 its reverse (1233161331), we get a palindrome (2564774652).

The spelling of 1331613321 in words is "one billion, three hundred thirty-one million, six hundred thirteen thousand, three hundred twenty-one".