55231340 has 12 divisors (see below), whose sum is σ = 115985856. Its totient is φ = 22092528.

The previous prime is 55231339. The next prime is 55231361. The reversal of 55231340 is 4313255.

55231340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380764 + ... + 1380803.

It is an arithmetic number, because the mean of its divisors is an integer number (9665488).

Almost surely, 2^55231340 is an apocalyptic number.

It is an amenable number.

55231340 is an abundant number, since it is smaller than the sum of its proper divisors (60754516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55231340 is a wasteful number, since it uses less digits than its factorization.

55231340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761576 (or 2761574 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55231340 is about 7431.7790602251. The cubic root of 55231340 is about 380.8276972269.

Adding to 55231340 its reverse (4313255), we get a palindrome (59544595).

The spelling of 55231340 in words is "fifty-five million, two hundred thirty-one thousand, three hundred forty".