55243315 has 4 divisors (see below), whose sum is σ = 66291984. Its totient is φ = 44194648.

The previous prime is 55243313. The next prime is 55243337. The reversal of 55243315 is 51334255.

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 55243315 - 2¹ = 55243313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55243313) 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, 5524327 + ... + 5524336.

It is an arithmetic number, because the mean of its divisors is an integer number (16572996).

Almost surely, 2^55243315 is an apocalyptic number.

55243315 is a deficient number, since it is larger than the sum of its proper divisors (11048669).

55243315 is a wasteful number, since it uses less digits than its factorization.

55243315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11048668.

The product of its digits is 9000, while the sum is 28.

The square root of 55243315 is about 7432.5846782933. The cubic root of 55243315 is about 380.8552183295.

The spelling of 55243315 in words is "fifty-five million, two hundred forty-three thousand, three hundred fifteen".