55136405 has 24 divisors (see below), whose sum is σ = 71214336. Its totient is φ = 40884800.

The previous prime is 55136387. The next prime is 55136413. The reversal of 55136405 is 50463155.

It is a de Polignac number, because none of the positive numbers 2^k-55136405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 545855 + ... + 545955.

It is an arithmetic number, because the mean of its divisors is an integer number (2967264).

Almost surely, 2^55136405 is an apocalyptic number.

It is an amenable number.

55136405 is a deficient number, since it is larger than the sum of its proper divisors (16077931).

55136405 is a wasteful number, since it uses less digits than its factorization.

55136405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55136405 is about 7425.3892153880. The cubic root of 55136405 is about 380.6093754568.

The spelling of 55136405 in words is "fifty-five million, one hundred thirty-six thousand, four hundred five".