1331322231 has 8 divisors (see below), whose sum is σ = 1775975040. Its totient is φ = 887108792.

The previous prime is 1331322221. The next prime is 1331322247. The reversal of 1331322231 is 1322231331.

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 1331322231 - 2¹⁰ = 1331321207 is a prime.

It is a super-2 number, since 2×1331322231² = 3544837765509634722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331322198 and 1331322207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331322221) 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, 102705 + ... + 114938.

It is an arithmetic number, because the mean of its divisors is an integer number (221996880).

Almost surely, 2^1331322231 is an apocalyptic number.

1331322231 is a deficient number, since it is larger than the sum of its proper divisors (444652809).

1331322231 is a wasteful number, since it uses less digits than its factorization.

1331322231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219685.

The product of its digits is 648, while the sum is 21.

The square root of 1331322231 is about 36487.2886222038. The cubic root of 1331322231 is about 1100.0887617079.

Adding to 1331322231 its reverse (1322231331), we get a palindrome (2653553562).

The spelling of 1331322231 in words is "one billion, three hundred thirty-one million, three hundred twenty-two thousand, two hundred thirty-one".