1145055231 has 16 divisors (see below), whose sum is σ = 1698196320. Its totient is φ = 762552000.

The previous prime is 1145055229. The next prime is 1145055251. The reversal of 1145055231 is 1325505411.

It is not a de Polignac number, because 1145055231 - 2¹ = 1145055229 is a prime.

It is a super-2 number, since 2×1145055231² = 2622302964080926722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1145055195 and 1145055204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145055251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3481 + ... + 47981.

It is an arithmetic number, because the mean of its divisors is an integer number (106137270).

Almost surely, 2^1145055231 is an apocalyptic number.

1145055231 is a deficient number, since it is larger than the sum of its proper divisors (553141089).

1145055231 is an equidigital number, since it uses as much as digits as its factorization.

1145055231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45463 (or 45457 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1145055231 is about 33838.6647342947. The cubic root of 1145055231 is about 1046.1857775869.

The spelling of 1145055231 in words is "one billion, one hundred forty-five million, fifty-five thousand, two hundred thirty-one".