227165520 has 160 divisors (see below), whose sum is σ = 765665280. Its totient is φ = 55503360.

The previous prime is 227165513. The next prime is 227165567. The reversal of 227165520 is 25561722.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140557 + ... + 142163.

It is an arithmetic number, because the mean of its divisors is an integer number (4785408).

Almost surely, 2^227165520 is an apocalyptic number.

227165520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 227165520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382832640).

227165520 is an abundant number, since it is smaller than the sum of its proper divisors (538499760).

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

227165520 is a wasteful number, since it uses less digits than its factorization.

227165520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 227165520 is about 15072.0111464927. The cubic root of 227165520 is about 610.1652512961.

The spelling of 227165520 in words is "two hundred twenty-seven million, one hundred sixty-five thousand, five hundred twenty".