55521205427 has 2 divisors, whose sum is σ = 55521205428. Its totient is φ = 55521205426.

The previous prime is 55521205423. The next prime is 55521205457. The reversal of 55521205427 is 72450212555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55521205427 - 2² = 55521205423 is a prime.

It is not a weakly prime, because it can be changed into another prime (55521205423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760602713 + 27760602714.

It is an arithmetic number, because the mean of its divisors is an integer number (27760602714).

Almost surely, 2^55521205427 is an apocalyptic number.

55521205427 is a deficient number, since it is larger than the sum of its proper divisors (1).

55521205427 is an equidigital number, since it uses as much as digits as its factorization.

55521205427 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 55521205427 in words is "fifty-five billion, five hundred twenty-one million, two hundred five thousand, four hundred twenty-seven".