55415407 has 4 divisors (see below), whose sum is σ = 55933416. Its totient is φ = 54897400.

The previous prime is 55415401. The next prime is 55415411. The reversal of 55415407 is 70451455.

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 55415407 - 2⁷ = 55415279 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55415401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258844 + ... + 259057.

It is an arithmetic number, because the mean of its divisors is an integer number (13983354).

Almost surely, 2^55415407 is an apocalyptic number.

55415407 is a deficient number, since it is larger than the sum of its proper divisors (518009).

55415407 is a wasteful number, since it uses less digits than its factorization.

55415407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518008.

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 55415407 is about 7444.1525373947. The cubic root of 55415407 is about 381.2502839020.

The spelling of 55415407 in words is "fifty-five million, four hundred fifteen thousand, four hundred seven".