1105311231 has 32 divisors (see below), whose sum is σ = 1706864640. Its totient is φ = 706125600.

The previous prime is 1105311227. The next prime is 1105311239. The reversal of 1105311231 is 1321135011.

1105311231 is a `hidden beast` number, since 1 + 10 + 531 + 123 + 1 = 666.

It is not a de Polignac number, because 1105311231 - 2² = 1105311227 is a prime.

It is a super-2 number, since 2×1105311231² = 2443425834749470722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105311239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79801 + ... + 92621.

It is an arithmetic number, because the mean of its divisors is an integer number (53339520).

Almost surely, 2^1105311231 is an apocalyptic number.

1105311231 is a deficient number, since it is larger than the sum of its proper divisors (601553409).

1105311231 is a wasteful number, since it uses less digits than its factorization.

1105311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12964 (or 12958 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1105311231 is about 33246.2213040821. The cubic root of 1105311231 is about 1033.9388662356.

Adding to 1105311231 its reverse (1321135011), we get a palindrome (2426446242).

The spelling of 1105311231 in words is "one billion, one hundred five million, three hundred eleven thousand, two hundred thirty-one".