55240345 has 4 divisors (see below), whose sum is σ = 66288420. Its totient is φ = 44192272.

The previous prime is 55240321. The next prime is 55240417. The reversal of 55240345 is 54304255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54304255 = 5 ⋅10860851.

It can be written as a sum of positive squares in 2 ways, for example, as 8714304 + 46526041 = 2952^2 + 6821^2 .

It is a cyclic number.

It is not a de Polignac number, because 55240345 - 2⁵ = 55240313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5524030 + ... + 5524039.

It is an arithmetic number, because the mean of its divisors is an integer number (16572105).

Almost surely, 2^55240345 is an apocalyptic number.

It is an amenable number.

55240345 is a deficient number, since it is larger than the sum of its proper divisors (11048075).

55240345 is a wasteful number, since it uses less digits than its factorization.

55240345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11048074.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55240345 is about 7432.3848797005. The cubic root of 55240345 is about 380.8483930073.

The spelling of 55240345 in words is "fifty-five million, two hundred forty thousand, three hundred forty-five".