55240517 has 2 divisors, whose sum is σ = 55240518. Its totient is φ = 55240516.

The previous prime is 55240511. The next prime is 55240529. The reversal of 55240517 is 71504255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49547521 + 5692996 = 7039^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 55240517 - 2⁴ = 55240501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55240517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55240511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27620258 + 27620259.

It is an arithmetic number, because the mean of its divisors is an integer number (27620259).

Almost surely, 2^55240517 is an apocalyptic number.

It is an amenable number.

55240517 is a deficient number, since it is larger than the sum of its proper divisors (1).

55240517 is an equidigital number, since it uses as much as digits as its factorization.

55240517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 55240517 is about 7432.3964506746. The cubic root of 55240517 is about 380.8487882852.

The spelling of 55240517 in words is "fifty-five million, two hundred forty thousand, five hundred seventeen".