55355240 has 16 divisors (see below), whose sum is σ = 124549380. Its totient is φ = 22142080.

The previous prime is 55355231. The next prime is 55355249. The reversal of 55355240 is 4255355.

It is a happy number.

55355240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55355231) and next prime (55355249).

It can be written as a sum of positive squares in 2 ways, for example, as 55145476 + 209764 = 7426^2 + 458^2 .

It is not an unprimeable number, because it can be changed into a prime (55355249) by changing a digit.

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, 691901 + ... + 691980.

Almost surely, 2^55355240 is an apocalyptic number.

It is an amenable number.

55355240 is an abundant number, since it is smaller than the sum of its proper divisors (69194140).

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

55355240 is a wasteful number, since it uses less digits than its factorization.

55355240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383892 (or 1383888 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 55355240 is about 7440.1102142374. The cubic root of 55355240 is about 381.1122537407.

The spelling of 55355240 in words is "fifty-five million, three hundred fifty-five thousand, two hundred forty".