1331230231 has 8 divisors (see below), whose sum is σ = 1415743280. Its totient is φ = 1248162048.

The previous prime is 1331230211. The next prime is 1331230259. The reversal of 1331230231 is 1320321331.

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 1331230231 - 2¹¹ = 1331228183 is a prime.

It is a super-2 number, since 2×1331230231² = 3544347855856626722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331230199 and 1331230208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331230211) 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, 359316 + ... + 363001.

It is an arithmetic number, because the mean of its divisors is an integer number (176967910).

Almost surely, 2^1331230231 is an apocalyptic number.

1331230231 is a deficient number, since it is larger than the sum of its proper divisors (84513049).

1331230231 is an equidigital number, since it uses as much as digits as its factorization.

1331230231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722433.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1331230231 is about 36486.0278873982. The cubic root of 1331230231 is about 1100.0634208613.

Adding to 1331230231 its reverse (1320321331), we get a palindrome (2651551562).

The spelling of 1331230231 in words is "one billion, three hundred thirty-one million, two hundred thirty thousand, two hundred thirty-one".