55136403 has 16 divisors (see below), whose sum is σ = 93352960. Its totient is φ = 31506408.

The previous prime is 55136387. The next prime is 55136413. The reversal of 55136403 is 30463155.

55136403 is a `hidden beast` number, since 5 + 5 + 13 + 640 + 3 = 666.

It is not a de Polignac number, because 55136403 - 2⁴ = 55136387 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55136413) 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 15 ways as a sum of consecutive naturals, for example, 145675 + ... + 146052.

It is an arithmetic number, because the mean of its divisors is an integer number (5834560).

Almost surely, 2^55136403 is an apocalyptic number.

55136403 is a deficient number, since it is larger than the sum of its proper divisors (38216557).

55136403 is a wasteful number, since it uses less digits than its factorization.

55136403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291743 (or 291737 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 55136403 is about 7425.3890807149. The cubic root of 55136403 is about 380.6093708548.

Adding to 55136403 its reverse (30463155), we get a palindrome (85599558).

The spelling of 55136403 in words is "fifty-five million, one hundred thirty-six thousand, four hundred three".