55571603 has 2 divisors, whose sum is σ = 55571604. Its totient is φ = 55571602.

The previous prime is 55571597. The next prime is 55571617. The reversal of 55571603 is 30617555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55571603 - 2⁴ = 55571587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55571603.

It is not a weakly prime, because it can be changed into another prime (55571683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27785801 + 27785802.

It is an arithmetic number, because the mean of its divisors is an integer number (27785802).

Almost surely, 2^55571603 is an apocalyptic number.

55571603 is a deficient number, since it is larger than the sum of its proper divisors (1).

55571603 is an equidigital number, since it uses as much as digits as its factorization.

55571603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 55571603 is about 7454.6363425723. The cubic root of 55571603 is about 381.6081501240.

The spelling of 55571603 in words is "fifty-five million, five hundred seventy-one thousand, six hundred three".