1109361231 has 128 divisors (see below), whose sum is σ = 2037934080. Its totient is φ = 587980800.

The previous prime is 1109361229. The next prime is 1109361251. The reversal of 1109361231 is 1321639011.

1109361231 is a `hidden beast` number, since 1 + 10 + 9 + 3 + 612 + 31 = 666.

It is not a de Polignac number, because 1109361231 - 2¹ = 1109361229 is a prime.

It is a super-2 number, since 2×1109361231² = 2461364681691670722, 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 = 1109361195 and 1109361204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109361251) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4761091 + ... + 4761323.

It is an arithmetic number, because the mean of its divisors is an integer number (15921360).

Almost surely, 2^1109361231 is an apocalyptic number.

1109361231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1109361231 is a deficient number, since it is larger than the sum of its proper divisors (928572849).

1109361231 is a wasteful number, since it uses less digits than its factorization.

1109361231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1109361231 is about 33307.0747889994. The cubic root of 1109361231 is about 1035.2001545271.

The spelling of 1109361231 in words is "one billion, one hundred nine million, three hundred sixty-one thousand, two hundred thirty-one".