55577261 has 4 divisors (see below), whose sum is σ = 58502400. Its totient is φ = 52652124.

The previous prime is 55577227. The next prime is 55577273. The reversal of 55577261 is 16277555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55577261 - 2¹⁰ = 55576237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55577281) 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 3 ways as a sum of consecutive naturals, for example, 1462541 + ... + 1462578.

It is an arithmetic number, because the mean of its divisors is an integer number (14625600).

Almost surely, 2^55577261 is an apocalyptic number.

It is an amenable number.

55577261 is a deficient number, since it is larger than the sum of its proper divisors (2925139).

55577261 is a wasteful number, since it uses less digits than its factorization.

55577261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925138.

The product of its digits is 73500, while the sum is 38.

The square root of 55577261 is about 7455.0158282863. The cubic root of 55577261 is about 381.6211007770.

The spelling of 55577261 in words is "fifty-five million, five hundred seventy-seven thousand, two hundred sixty-one".