55403424 has 36 divisors (see below), whose sum is σ = 157554306. Its totient is φ = 18467712.

The previous prime is 55403371. The next prime is 55403429. The reversal of 55403424 is 42430455.

It can be written as a sum of positive squares in only one way, i.e., 30603024 + 24800400 = 5532^2 + 4980^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (55403429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95899 + ... + 96474.

Almost surely, 2^55403424 is an apocalyptic number.

It is an amenable number.

55403424 is an abundant number, since it is smaller than the sum of its proper divisors (102150882).

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

55403424 is a wasteful number, since it uses less digits than its factorization.

55403424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192389 (or 192378 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 55403424 is about 7443.3476339615. The cubic root of 55403424 is about 381.2228014638. Note that the first 3 decimals are identical.

Adding to 55403424 its reverse (42430455), we get a palindrome (97833879).

The spelling of 55403424 in words is "fifty-five million, four hundred three thousand, four hundred twenty-four".