1145351331 has 24 divisors (see below), whose sum is σ = 1746235920. Its totient is φ = 721400256.

The previous prime is 1145351323. The next prime is 1145351351. The reversal of 1145351331 is 1331535411.

It is a happy number.

1145351331 is a `hidden beast` number, since 1 + 145 + 3 + 513 + 3 + 1 = 666.

It is not a de Polignac number, because 1145351331 - 2³ = 1145351323 is a prime.

It is a super-2 number, since 2×1145351331² = 2623659342846943122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145351295 and 1145351304.

It is not an unprimeable number, because it can be changed into a prime (1145351321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54805 + ... + 72761.

It is an arithmetic number, because the mean of its divisors is an integer number (72759830).

Almost surely, 2^1145351331 is an apocalyptic number.

1145351331 is a deficient number, since it is larger than the sum of its proper divisors (600884589).

1145351331 is a wasteful number, since it uses less digits than its factorization.

1145351331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18355 (or 18352 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 1145351331 is about 33843.0396241236. The cubic root of 1145351331 is about 1046.2759475928.

Adding to 1145351331 its reverse (1331535411), we get a palindrome (2476886742).

The spelling of 1145351331 in words is "one billion, one hundred forty-five million, three hundred fifty-one thousand, three hundred thirty-one".