55730403 has 32 divisors (see below), whose sum is σ = 91238400. Its totient is φ = 33441408.

The previous prime is 55730383. The next prime is 55730407. The reversal of 55730403 is 30403755.

It is a happy number.

55730403 is a nontrivial binomial coefficient, being equal to C(10558, 2).

It is not a de Polignac number, because 55730403 - 2⁵ = 55730371 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (55730407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7918 + ... + 13196.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^55730403 is an apocalyptic number.

55730403 is the 10557-th triangular number and also the 5279-th hexagonal number.

55730403 is a deficient number, since it is larger than the sum of its proper divisors (35507997).

55730403 is a wasteful number, since it uses less digits than its factorization.

55730403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328 (or 5322 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 55730403 is about 7465.2798340049. The cubic root of 55730403 is about 381.9712956877.

The spelling of 55730403 in words is "fifty-five million, seven hundred thirty thousand, four hundred three".