1145523231 has 24 divisors (see below), whose sum is σ = 1698802560. Its totient is φ = 743385600.

The previous prime is 1145523199. The next prime is 1145523241. The reversal of 1145523231 is 1323255411.

1145523231 is a `hidden beast` number, since 114 + 5 + 523 + 23 + 1 = 666.

It is not a de Polignac number, because 1145523231 - 2⁵ = 1145523199 is a prime.

It is a super-2 number, since 2×1145523231² = 2624446945521358722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145523195 and 1145523204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145523241) 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, 173511 + ... + 179991.

It is an arithmetic number, because the mean of its divisors is an integer number (70783440).

Almost surely, 2^1145523231 is an apocalyptic number.

1145523231 is a deficient number, since it is larger than the sum of its proper divisors (553279329).

1145523231 is a wasteful number, since it uses less digits than its factorization.

1145523231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007 (or 7004 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1145523231 is about 33845.5791943350. The cubic root of 1145523231 is about 1046.3282883997.

Adding to 1145523231 its reverse (1323255411), we get a palindrome (2468778642).

The spelling of 1145523231 in words is "one billion, one hundred forty-five million, five hundred twenty-three thousand, two hundred thirty-one".