1331310231 has 12 divisors (see below), whose sum is σ = 1935254152. Its totient is φ = 881886096.

The previous prime is 1331310193. The next prime is 1331310247. The reversal of 1331310231 is 1320131331.

It is a happy number.

1331310231 is a `hidden beast` number, since 1 + 331 + 310 + 23 + 1 = 666.

It is not a de Polignac number, because 1331310231 - 2⁹ = 1331309719 is a prime.

It is a super-2 number, since 2×1331310231² = 3544773862330546722, 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 (1331310251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469681 + ... + 472506.

Almost surely, 2^1331310231 is an apocalyptic number.

1331310231 is a deficient number, since it is larger than the sum of its proper divisors (603943921).

1331310231 is a wasteful number, since it uses less digits than its factorization.

1331310231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942350 (or 942347 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1331310231 is about 36487.1241810039. The cubic root of 1331310231 is about 1100.0854564463.

Adding to 1331310231 its reverse (1320131331), we get a palindrome (2651441562).

The spelling of 1331310231 in words is "one billion, three hundred thirty-one million, three hundred ten thousand, two hundred thirty-one".