227155140 has 36 divisors (see below), whose sum is σ = 689037804. Its totient is φ = 60574656.

The previous prime is 227155109. The next prime is 227155141. The reversal of 227155140 is 41551722.

227155140 is a `hidden beast` number, since 2 + 2 + 71 + 551 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 137170944 + 89984196 = 11712^2 + 9486^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (227155141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630807 + ... + 631166.

It is an arithmetic number, because the mean of its divisors is an integer number (19139939).

Almost surely, 2^227155140 is an apocalyptic number.

227155140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

227155140 is an abundant number, since it is smaller than the sum of its proper divisors (461882664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

227155140 is a wasteful number, since it uses less digits than its factorization.

227155140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261988 (or 1261983 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 227155140 is about 15071.6667956799. Note that the first 3 decimals coincide. The cubic root of 227155140 is about 610.1559576149.

The spelling of 227155140 in words is "two hundred twenty-seven million, one hundred fifty-five thousand, one hundred forty".