55571607 has 24 divisors (see below), whose sum is σ = 98795424. Its totient is φ = 29312064.

The previous prime is 55571603. The next prime is 55571617. The reversal of 55571607 is 70617555.

It is not a de Polignac number, because 55571607 - 2² = 55571603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55571603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33108 + ... + 34745.

It is an arithmetic number, because the mean of its divisors is an integer number (4116476).

Almost surely, 2^55571607 is an apocalyptic number.

55571607 is a deficient number, since it is larger than the sum of its proper divisors (43223817).

55571607 is a wasteful number, since it uses less digits than its factorization.

55571607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67879 (or 67876 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 55571607 is about 7454.6366108617. The cubic root of 55571607 is about 381.6081592799.

The spelling of 55571607 in words is "fifty-five million, five hundred seventy-one thousand, six hundred seven".