1145112331 has 4 divisors (see below), whose sum is σ = 1249213464. Its totient is φ = 1041011200.

The previous prime is 1145112323. The next prime is 1145112361. The reversal of 1145112331 is 1332115411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1332115411 = 11 ⋅121101401.

It is a cyclic number.

It is not a de Polignac number, because 1145112331 - 2³ = 1145112323 is a prime.

It is a super-2 number, since 2×1145112331² = 2622564501216507122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145112301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52050550 + ... + 52050571.

It is an arithmetic number, because the mean of its divisors is an integer number (312303366).

Almost surely, 2^1145112331 is an apocalyptic number.

1145112331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1145112331 is a deficient number, since it is larger than the sum of its proper divisors (104101133).

1145112331 is a wasteful number, since it uses less digits than its factorization.

1145112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104101132.

The product of its digits is 360, while the sum is 22.

The square root of 1145112331 is about 33839.5084331909. The cubic root of 1145112331 is about 1046.2031672037.

Adding to 1145112331 its reverse (1332115411), we get a palindrome (2477227742).

The spelling of 1145112331 in words is "one billion, one hundred forty-five million, one hundred twelve thousand, three hundred thirty-one".