55255145 has 16 divisors (see below), whose sum is σ = 72895680. Its totient is φ = 39873600.

The previous prime is 55255133. The next prime is 55255157. The reversal of 55255145 is 54155255.

It is an interprime number because it is at equal distance from previous prime (55255133) and next prime (55255157).

It is not a de Polignac number, because 55255145 - 2¹⁴ = 55238761 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3371 + ... + 11039.

It is an arithmetic number, because the mean of its divisors is an integer number (4555980).

Almost surely, 2^55255145 is an apocalyptic number.

55255145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55255145 is a deficient number, since it is larger than the sum of its proper divisors (17640535).

55255145 is a wasteful number, since it uses less digits than its factorization.

55255145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816.

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

The square root of 55255145 is about 7433.3804557550. The cubic root of 55255145 is about 380.8824022863.

The spelling of 55255145 in words is "fifty-five million, two hundred fifty-five thousand, one hundred forty-five".