27765225 has 18 divisors (see below), whose sum is σ = 49731006. Its totient is φ = 14808000.

The previous prime is 27765217. The next prime is 27765247. The reversal of 27765225 is 52256772.

It can be written as a sum of positive squares in 3 ways, for example, as 7080921 + 20684304 = 2661^2 + 4548^2 .

It is not a de Polignac number, because 27765225 - 2³ = 27765217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27765225.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 61476 + ... + 61925.

Almost surely, 2^27765225 is an apocalyptic number.

27765225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27765225 is a deficient number, since it is larger than the sum of its proper divisors (21965781).

27765225 is a wasteful number, since it uses less digits than its factorization.

27765225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123417 (or 123409 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 27765225 is about 5269.2717713172. The cubic root of 27765225 is about 302.8078054431.

It can be divided in two parts, 2776 and 5225, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 27765225 in words is "twenty-seven million, seven hundred sixty-five thousand, two hundred twenty-five".