55461515 has 4 divisors (see below), whose sum is σ = 66553824. Its totient is φ = 44369208.

The previous prime is 55461509. The next prime is 55461569. The reversal of 55461515 is 51516455.

55461515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51516455 = 5 ⋅10303291.

It is a cyclic number.

It is not a de Polignac number, because 55461515 - 2¹⁰ = 55460491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5546147 + ... + 5546156.

It is an arithmetic number, because the mean of its divisors is an integer number (16638456).

Almost surely, 2^55461515 is an apocalyptic number.

55461515 is a deficient number, since it is larger than the sum of its proper divisors (11092309).

55461515 is a wasteful number, since it uses less digits than its factorization.

55461515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092308.

The product of its digits is 15000, while the sum is 32.

The square root of 55461515 is about 7447.2488208734. The cubic root of 55461515 is about 381.3559934623.

The spelling of 55461515 in words is "fifty-five million, four hundred sixty-one thousand, five hundred fifteen".