55440293 has 4 divisors (see below), whose sum is σ = 55517280. Its totient is φ = 55363308.

The previous prime is 55440263. The next prime is 55440313. The reversal of 55440293 is 39204455.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39204455 = 5 ⋅7840891.

It is a cyclic number.

It is not a de Polignac number, because 55440293 - 2⁸ = 55440037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55440223) 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, 37403 + ... + 38856.

It is an arithmetic number, because the mean of its divisors is an integer number (13879320).

Almost surely, 2^55440293 is an apocalyptic number.

It is an amenable number.

55440293 is a deficient number, since it is larger than the sum of its proper divisors (76987).

55440293 is an equidigital number, since it uses as much as digits as its factorization.

55440293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76986.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 55440293 is about 7445.8238630792. The cubic root of 55440293 is about 381.3073460992.

It can be divided in two parts, 554 and 40293, that multiplied together give a palindrome (22322322).

The spelling of 55440293 in words is "fifty-five million, four hundred forty thousand, two hundred ninety-three".