55043697 has 4 divisors (see below), whose sum is σ = 73391600. Its totient is φ = 36695796.

The previous prime is 55043683. The next prime is 55043707. The reversal of 55043697 is 79634055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55043697 - 2¹⁸ = 54781553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55043617) 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, 9173947 + ... + 9173952.

It is an arithmetic number, because the mean of its divisors is an integer number (18347900).

Almost surely, 2^55043697 is an apocalyptic number.

It is an amenable number.

55043697 is a deficient number, since it is larger than the sum of its proper divisors (18347903).

55043697 is a wasteful number, since it uses less digits than its factorization.

55043697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18347902.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 55043697 is about 7419.1439533143. The cubic root of 55043697 is about 380.3959331211.

The spelling of 55043697 in words is "fifty-five million, forty-three thousand, six hundred ninety-seven".