55507203 has 12 divisors (see below), whose sum is σ = 80393560. Its totient is φ = 36904896.

The previous prime is 55507187. The next prime is 55507237. The reversal of 55507203 is 30270555.

It is not a de Polignac number, because 55507203 - 2⁴ = 55507187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55507603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4726 + ... + 11547.

Almost surely, 2^55507203 is an apocalyptic number.

55507203 is a deficient number, since it is larger than the sum of its proper divisors (24886357).

55507203 is a wasteful number, since it uses less digits than its factorization.

55507203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16658 (or 16655 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 55507203 is about 7450.3156308978. The cubic root of 55507203 is about 381.4606823352.

Adding to 55507203 its reverse (30270555), we get a palindrome (85777758).

The spelling of 55507203 in words is "fifty-five million, five hundred seven thousand, two hundred three".