55575261 has 64 divisors (see below), whose sum is σ = 101952000. Its totient is φ = 29804544.

The previous prime is 55575259. The next prime is 55575287. The reversal of 55575261 is 16257555.

It is a happy number.

It is not a de Polignac number, because 55575261 - 2¹ = 55575259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55575211) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 157261 + ... + 157613.

It is an arithmetic number, because the mean of its divisors is an integer number (1593000).

Almost surely, 2^55575261 is an apocalyptic number.

55575261 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55575261 is a deficient number, since it is larger than the sum of its proper divisors (46376739).

55575261 is a wasteful number, since it uses less digits than its factorization.

55575261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 380 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 55575261 is about 7454.8816892020. The cubic root of 55575261 is about 381.6165230573.

The spelling of 55575261 in words is "fifty-five million, five hundred seventy-five thousand, two hundred sixty-one".