55148013 has 32 divisors (see below), whose sum is σ = 86601600. Its totient is φ = 34587648.

The previous prime is 55148011. The next prime is 55148021. The reversal of 55148013 is 31084155.

It is not a de Polignac number, because 55148013 - 2¹ = 55148011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55148011) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 98731 + ... + 99287.

It is an arithmetic number, because the mean of its divisors is an integer number (2706300).

Almost surely, 2^55148013 is an apocalyptic number.

It is an amenable number.

55148013 is a deficient number, since it is larger than the sum of its proper divisors (31453587).

55148013 is a wasteful number, since it uses less digits than its factorization.

55148013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 55148013 is about 7426.1708167803. The cubic root of 55148013 is about 380.6360837851.

The spelling of 55148013 in words is "fifty-five million, one hundred forty-eight thousand, thirteen".