55331001 has 48 divisors (see below), whose sum is σ = 91353600. Its totient is φ = 32234400.

The previous prime is 55330997. The next prime is 55331011. The reversal of 55331001 is 10013355.

It is a happy number.

It is not a de Polignac number, because 55331001 - 2² = 55330997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55331011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 371275 + ... + 371423.

It is an arithmetic number, because the mean of its divisors is an integer number (1903200).

Almost surely, 2^55331001 is an apocalyptic number.

It is an amenable number.

55331001 is a deficient number, since it is larger than the sum of its proper divisors (36022599).

55331001 is a wasteful number, since it uses less digits than its factorization.

55331001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 55331001 is about 7438.4810949548. The cubic root of 55331001 is about 381.0566183658.

Adding to 55331001 its reverse (10013355), we get a palindrome (65344356).

The spelling of 55331001 in words is "fifty-five million, three hundred thirty-one thousand, one".