55312266 has 16 divisors (see below), whose sum is σ = 112183488. Its totient is φ = 18177600.

The previous prime is 55312189. The next prime is 55312267. The reversal of 55312266 is 66221355.

It is not an unprimeable number, because it can be changed into a prime (55312267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64495 + ... + 65346.

It is an arithmetic number, because the mean of its divisors is an integer number (7011468).

Almost surely, 2^55312266 is an apocalyptic number.

55312266 is an abundant number, since it is smaller than the sum of its proper divisors (56871222).

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

55312266 is a wasteful number, since it uses less digits than its factorization.

55312266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129917.

The product of its digits is 10800, while the sum is 30.

The square root of 55312266 is about 7437.2216586572. The cubic root of 55312266 is about 381.0136050969.

The spelling of 55312266 in words is "fifty-five million, three hundred twelve thousand, two hundred sixty-six".