55503331 has 8 divisors (see below), whose sum is σ = 59847984. Its totient is φ = 51169440.

The previous prime is 55503323. The next prime is 55503341. The reversal of 55503331 is 13330555.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55503331 - 2³ = 55503323 is a prime.

It is a super-2 number, since 2×55503331² = 6161239504191122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 55503296 and 55503305.

It is not an unprimeable number, because it can be changed into a prime (55503311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10425 + ... + 14821.

It is an arithmetic number, because the mean of its divisors is an integer number (7480998).

Almost surely, 2^55503331 is an apocalyptic number.

55503331 is a deficient number, since it is larger than the sum of its proper divisors (4344653).

55503331 is a wasteful number, since it uses less digits than its factorization.

55503331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381.

The product of its (nonzero) digits is 3375, while the sum is 25.

The square root of 55503331 is about 7450.0557716033. The cubic root of 55503331 is about 381.4518123146.

Adding to 55503331 its reverse (13330555), we get a palindrome (68833886).

The spelling of 55503331 in words is "fifty-five million, five hundred three thousand, three hundred thirty-one".