1331148231 has 12 divisors (see below), whose sum is σ = 2197451152. Its totient is φ = 760656096.

The previous prime is 1331148193. The next prime is 1331148239. The reversal of 1331148231 is 1328411331.

It is not a de Polignac number, because 1331148231 - 2⁶ = 1331148167 is a prime.

It is a super-2 number, since 2×1331148231² = 3543911225788858722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331148195 and 1331148204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331148239) 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, 10564606 + ... + 10564731.

Almost surely, 2^1331148231 is an apocalyptic number.

1331148231 is a deficient number, since it is larger than the sum of its proper divisors (866302921).

1331148231 is a wasteful number, since it uses less digits than its factorization.

1331148231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21129350 (or 21129347 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1331148231 is about 36484.9041522655. The cubic root of 1331148231 is about 1100.0408334704.

Adding to 1331148231 its reverse (1328411331), we get a palindrome (2659559562).

The spelling of 1331148231 in words is "one billion, three hundred thirty-one million, one hundred forty-eight thousand, two hundred thirty-one".