55906403 has 12 divisors (see below), whose sum is σ = 67278240. Its totient is φ = 46266192.

The previous prime is 55906397. The next prime is 55906441. The reversal of 55906403 is 30460955.

It is a happy number.

It is not a de Polignac number, because 55906403 - 2⁶ = 55906339 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 55906403.

It is not an unprimeable number, because it can be changed into a prime (55906703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18251 + ... + 21092.

It is an arithmetic number, because the mean of its divisors is an integer number (5606520).

Almost surely, 2^55906403 is an apocalyptic number.

55906403 is a deficient number, since it is larger than the sum of its proper divisors (11371837).

55906403 is a wasteful number, since it uses less digits than its factorization.

55906403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39386 (or 39379 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 55906403 is about 7477.0584456723. The cubic root of 55906403 is about 382.3729693368.

The spelling of 55906403 in words is "fifty-five million, nine hundred six thousand, four hundred three".