55330231 has 12 divisors (see below), whose sum is σ = 62523864. Its totient is φ = 48557600.

The previous prime is 55330211. The next prime is 55330237. The reversal of 55330231 is 13203355.

It is a happy number.

It is not a de Polignac number, because 55330231 - 2⁵ = 55330199 is a prime.

It is a super-2 number, since 2×55330231² = 6122868925026722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55330237) 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, 6261 + ... + 12241.

It is an arithmetic number, because the mean of its divisors is an integer number (5210322).

Almost surely, 2^55330231 is an apocalyptic number.

55330231 is a deficient number, since it is larger than the sum of its proper divisors (7193633).

55330231 is a wasteful number, since it uses less digits than its factorization.

55330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6050 (or 6021 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 55330231 is about 7438.4293368963. The cubic root of 55330231 is about 381.0548507313.

Adding to 55330231 its reverse (13203355), we get a palindrome (68533586).

The spelling of 55330231 in words is "fifty-five million, three hundred thirty thousand, two hundred thirty-one".