56091285 has 20 divisors (see below), whose sum is σ = 100549548. Its totient is φ = 29915136.

The previous prime is 56091283. The next prime is 56091289. The reversal of 56091285 is 58219065.

It is a happy number.

56091285 is a `hidden beast` number, since 560 + 9 + 12 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8191044 + 47900241 = 2862^2 + 6921^2 .

It is not a de Polignac number, because 56091285 - 2¹ = 56091283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56091283) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68844 + ... + 69653.

Almost surely, 2^56091285 is an apocalyptic number.

It is an amenable number.

56091285 is a deficient number, since it is larger than the sum of its proper divisors (44458263).

56091285 is a wasteful number, since it uses less digits than its factorization.

56091285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138514 (or 138505 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 56091285 is about 7489.4115256140. The cubic root of 56091285 is about 382.7940069423.

The spelling of 56091285 in words is "fifty-six million, ninety-one thousand, two hundred eighty-five".