55811265 has 32 divisors (see below), whose sum is σ = 94884480. Its totient is φ = 27933696.

The previous prime is 55811263. The next prime is 55811267. The reversal of 55811265 is 56211855.

55811265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55811263) and next prime (55811267).

It is not a de Polignac number, because 55811265 - 2¹ = 55811263 is a prime.

It is a super-2 number, since 2×55811265² = 6229794601800450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55811263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31339 + ... + 33071.

It is an arithmetic number, because the mean of its divisors is an integer number (2965140).

Almost surely, 2^55811265 is an apocalyptic number.

It is an amenable number.

55811265 is a deficient number, since it is larger than the sum of its proper divisors (39073215).

55811265 is a wasteful number, since it uses less digits than its factorization.

55811265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873.

The product of its digits is 12000, while the sum is 33.

The square root of 55811265 is about 7470.6937428863. The cubic root of 55811265 is about 382.1559467627.

The spelling of 55811265 in words is "fifty-five million, eight hundred eleven thousand, two hundred sixty-five".