55542515 has 16 divisors (see below), whose sum is σ = 76621248. Its totient is φ = 37862016.

The previous prime is 55542503. The next prime is 55542517. The reversal of 55542515 is 51524555.

It is a cyclic number.

It is not a de Polignac number, because 55542515 - 2⁴ = 55542499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55542517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1469 + ... + 10641.

It is an arithmetic number, because the mean of its divisors is an integer number (4788828).

Almost surely, 2^55542515 is an apocalyptic number.

55542515 is a deficient number, since it is larger than the sum of its proper divisors (21078733).

55542515 is a wasteful number, since it uses less digits than its factorization.

55542515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358.

The product of its digits is 25000, while the sum is 32.

The square root of 55542515 is about 7452.6850865980. The cubic root of 55542515 is about 381.5415564288.

The spelling of 55542515 in words is "fifty-five million, five hundred forty-two thousand, five hundred fifteen".