55155243 has 32 divisors (see below), whose sum is σ = 87494400. Its totient is φ = 30464640.

The previous prime is 55155239. The next prime is 55155251. The reversal of 55155243 is 34255155.

It is a happy number.

55155243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55155243 - 2² = 55155239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55155243.

It is not an unprimeable number, because it can be changed into a prime (55155253) 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, 34833 + ... + 36381.

It is an arithmetic number, because the mean of its divisors is an integer number (2734200).

Almost surely, 2^55155243 is an apocalyptic number.

55155243 is a deficient number, since it is larger than the sum of its proper divisors (32339157).

55155243 is a wasteful number, since it uses less digits than its factorization.

55155243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659.

The product of its digits is 15000, while the sum is 30.

The square root of 55155243 is about 7426.6575927533. The cubic root of 55155243 is about 380.6527170748.

The spelling of 55155243 in words is "fifty-five million, one hundred fifty-five thousand, two hundred forty-three".