55971603 has 12 divisors (see below), whose sum is σ = 81111888. Its totient is φ = 37192560.

The previous prime is 55971583. The next prime is 55971611. The reversal of 55971603 is 30617955.

It is a happy number.

55971603 is a `hidden beast` number, since 5 + 597 + 1 + 60 + 3 = 666.

55971603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55971603 - 2⁵ = 55971571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55971613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7200 + ... + 12797.

It is an arithmetic number, because the mean of its divisors is an integer number (6759324).

Almost surely, 2^55971603 is an apocalyptic number.

55971603 is a deficient number, since it is larger than the sum of its proper divisors (25140285).

55971603 is a wasteful number, since it uses less digits than its factorization.

55971603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20314 (or 20311 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 55971603 is about 7481.4171785832. The cubic root of 55971603 is about 382.5215571600.

The spelling of 55971603 in words is "fifty-five million, nine hundred seventy-one thousand, six hundred three".