55344540 has 48 divisors (see below), whose sum is σ = 155302560. Its totient is φ = 14726400.

The previous prime is 55344539. The next prime is 55344593. The reversal of 55344540 is 4544355.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55344498 and 55344507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41890 + ... + 43190.

It is an arithmetic number, because the mean of its divisors is an integer number (3235470).

Almost surely, 2^55344540 is an apocalyptic number.

It is an amenable number.

55344540 is an abundant number, since it is smaller than the sum of its proper divisors (99958020).

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

55344540 is a wasteful number, since it uses less digits than its factorization.

55344540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 2020 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 55344540 is about 7439.3911041160. The cubic root of 55344540 is about 381.0876962107.

Adding to 55344540 its reverse (4544355), we get a palindrome (59888895).

The spelling of 55344540 in words is "fifty-five million, three hundred forty-four thousand, five hundred forty".