55266243 has 4 divisors (see below), whose sum is σ = 73688328. Its totient is φ = 36844160.

The previous prime is 55266203. The next prime is 55266247. The reversal of 55266243 is 34266255.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55266243 - 2⁶ = 55266179 is a prime.

It is a super-3 number, since 3×55266243³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55266247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9211038 + ... + 9211043.

It is an arithmetic number, because the mean of its divisors is an integer number (18422082).

Almost surely, 2^55266243 is an apocalyptic number.

55266243 is a deficient number, since it is larger than the sum of its proper divisors (18422085).

55266243 is a wasteful number, since it uses less digits than its factorization.

55266243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18422084.

The product of its digits is 43200, while the sum is 33.

The square root of 55266243 is about 7434.1269157851. The cubic root of 55266243 is about 380.9079006655.

It can be divided in two parts, 552 and 66243, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 55266243 in words is "fifty-five million, two hundred sixty-six thousand, two hundred forty-three".