55555415 has 4 divisors (see below), whose sum is σ = 66666504. Its totient is φ = 44444328.

The previous prime is 55555399. The next prime is 55555429. The reversal of 55555415 is 51455555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55555415 - 2⁴ = 55555399 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555537 + ... + 5555546.

It is an arithmetic number, because the mean of its divisors is an integer number (16666626).

Almost surely, 2^55555415 is an apocalyptic number.

55555415 is a deficient number, since it is larger than the sum of its proper divisors (11111089).

55555415 is a wasteful number, since it uses less digits than its factorization.

55555415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111088.

The product of its digits is 62500, while the sum is 35.

The square root of 55555415 is about 7453.5504962400. The cubic root of 55555415 is about 381.5710923923.

The spelling of 55555415 in words is "fifty-five million, five hundred fifty-five thousand, four hundred fifteen".