55353240 has 128 divisors (see below), whose sum is σ = 186624000. Its totient is φ = 14592384.

The previous prime is 55353229. The next prime is 55353299. The reversal of 55353240 is 4235355.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115321 + ... + 115799.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^55353240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55353240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93312000).

55353240 is an abundant number, since it is smaller than the sum of its proper divisors (131270760).

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

55353240 is a wasteful number, since it uses less digits than its factorization.

55353240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 55353240 is about 7439.9758064123. The cubic root of 55353240 is about 381.1076637887.

Adding to 55353240 its reverse (4235355), we get a palindrome (59588595).

The spelling of 55353240 in words is "fifty-five million, three hundred fifty-three thousand, two hundred forty".