55601599 has 2 divisors, whose sum is σ = 55601600. Its totient is φ = 55601598.

The previous prime is 55601597. The next prime is 55601647. The reversal of 55601599 is 99510655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55601599 - 2¹ = 55601597 is a prime.

It is a super-3 number, since 3×55601599³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 55601597, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55601597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27800799 + 27800800.

It is an arithmetic number, because the mean of its divisors is an integer number (27800800).

Almost surely, 2^55601599 is an apocalyptic number.

55601599 is a deficient number, since it is larger than the sum of its proper divisors (1).

55601599 is an equidigital number, since it uses as much as digits as its factorization.

55601599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 55601599 is about 7456.6479734530. The cubic root of 55601599 is about 381.6767982496.

The spelling of 55601599 in words is "fifty-five million, six hundred one thousand, five hundred ninety-nine".