55995587 has 2 divisors, whose sum is σ = 55995588. Its totient is φ = 55995586.

The previous prime is 55995581. The next prime is 55995617. The reversal of 55995587 is 78559955.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55995587 is a prime.

It is not a weakly prime, because it can be changed into another prime (55995581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27997793 + 27997794.

It is an arithmetic number, because the mean of its divisors is an integer number (27997794).

Almost surely, 2^55995587 is an apocalyptic number.

55995587 is a deficient number, since it is larger than the sum of its proper divisors (1).

55995587 is an equidigital number, since it uses as much as digits as its factorization.

55995587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2835000, while the sum is 53.

The square root of 55995587 is about 7483.0199117736. The cubic root of 55995587 is about 382.5761865699.

The spelling of 55995587 in words is "fifty-five million, nine hundred ninety-five thousand, five hundred eighty-seven".