55521205247 has 2 divisors, whose sum is σ = 55521205248. Its totient is φ = 55521205246.

The previous prime is 55521205231. The next prime is 55521205253. The reversal of 55521205247 is 74250212555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55521205247 - 2⁴ = 55521205231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55521205247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55521235247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760602623 + 27760602624.

It is an arithmetic number, because the mean of its divisors is an integer number (27760602624).

Almost surely, 2^55521205247 is an apocalyptic number.

55521205247 is a deficient number, since it is larger than the sum of its proper divisors (1).

55521205247 is an equidigital number, since it uses as much as digits as its factorization.

55521205247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140000, while the sum is 38.

The spelling of 55521205247 in words is "fifty-five billion, five hundred twenty-one million, two hundred five thousand, two hundred forty-seven".