1228313181 has 16 divisors (see below), whose sum is σ = 1681300224. Its totient is φ = 797282304.

The previous prime is 1228313179. The next prime is 1228313209. The reversal of 1228313181 is 1813138221.

It is not a de Polignac number, because 1228313181 - 2¹ = 1228313179 is a prime.

It is a super-2 number, since 2×1228313181² = 3017506541236677522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228313131) 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, 4645 + ... + 49781.

It is an arithmetic number, because the mean of its divisors is an integer number (105081264).

Almost surely, 2^1228313181 is an apocalyptic number.

It is an amenable number.

1228313181 is a deficient number, since it is larger than the sum of its proper divisors (452987043).

1228313181 is a wasteful number, since it uses less digits than its factorization.

1228313181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45380.

The product of its digits is 2304, while the sum is 30.

The square root of 1228313181 is about 35047.2991969424. The cubic root of 1228313181 is about 1070.9512549728.

The spelling of 1228313181 in words is "one billion, two hundred twenty-eight million, three hundred thirteen thousand, one hundred eighty-one".