53443555 has 16 divisors (see below), whose sum is σ = 71011584. Its totient is φ = 38285280.

The previous prime is 53443553. The next prime is 53443571. The reversal of 53443555 is 55534435.

It is not a de Polignac number, because 53443555 - 2¹ = 53443553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53443555.

It is not an unprimeable number, because it can be changed into a prime (53443553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3567 + ... + 10936.

It is an arithmetic number, because the mean of its divisors is an integer number (4438224).

Almost surely, 2^53443555 is an apocalyptic number.

53443555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53443555 is a deficient number, since it is larger than the sum of its proper divisors (17568029).

53443555 is a wasteful number, since it uses less digits than its factorization.

53443555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14586.

The product of its digits is 90000, while the sum is 34.

The square root of 53443555 is about 7310.5099001369. The cubic root of 53443555 is about 376.6735395236.

The spelling of 53443555 in words is "fifty-three million, four hundred forty-three thousand, five hundred fifty-five".