55603331 has 4 divisors (see below), whose sum is σ = 63546672. Its totient is φ = 47659992.

The previous prime is 55603321. The next prime is 55603349. The reversal of 55603331 is 13330655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55603331 - 2¹⁰ = 55602307 is a prime.

It is a super-2 number, since 2×55603331² = 6183460836591122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55603331.

It is not an unprimeable number, because it can be changed into a prime (55603321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3971660 + ... + 3971673.

It is an arithmetic number, because the mean of its divisors is an integer number (15886668).

Almost surely, 2^55603331 is an apocalyptic number.

55603331 is a deficient number, since it is larger than the sum of its proper divisors (7943341).

55603331 is an equidigital number, since it uses as much as digits as its factorization.

55603331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7943340.

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 55603331 is about 7456.7641105241. The cubic root of 55603331 is about 381.6807613092.

Adding to 55603331 its reverse (13330655), we get a palindrome (68933986).

The spelling of 55603331 in words is "fifty-five million, six hundred three thousand, three hundred thirty-one".