1331330231 has 48 divisors (see below), whose sum is σ = 1824906240. Its totient is φ = 942251520.

The previous prime is 1331330219. The next prime is 1331330239. The reversal of 1331330231 is 1320331331.

It is not a de Polignac number, because 1331330231 - 2²⁶ = 1264221367 is a prime.

It is a super-2 number, since 2×1331330231² = 3544880367949026722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331330239) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 644306 + ... + 646368.

It is an arithmetic number, because the mean of its divisors is an integer number (38018880).

Almost surely, 2^1331330231 is an apocalyptic number.

1331330231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1331330231 is a deficient number, since it is larger than the sum of its proper divisors (493576009).

1331330231 is a wasteful number, since it uses less digits than its factorization.

1331330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1331330231 is about 36487.3982492586. The cubic root of 1331330231 is about 1100.0909652046.

Adding to 1331330231 its reverse (1320331331), we get a palindrome (2651661562).

The spelling of 1331330231 in words is "one billion, three hundred thirty-one million, three hundred thirty thousand, two hundred thirty-one".