55577247 has 16 divisors (see below), whose sum is σ = 81586560. Its totient is φ = 33372000.

The previous prime is 55577227. The next prime is 55577273. The reversal of 55577247 is 74277555.

It is not a de Polignac number, because 55577247 - 2¹⁸ = 55315103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55577199 and 55577208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55577227) 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, 4129 + ... + 11322.

It is an arithmetic number, because the mean of its divisors is an integer number (5099160).

Almost surely, 2^55577247 is an apocalyptic number.

55577247 is a deficient number, since it is larger than the sum of its proper divisors (26009313).

55577247 is a wasteful number, since it uses less digits than its factorization.

55577247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15574.

The product of its digits is 343000, while the sum is 42.

The square root of 55577247 is about 7455.0148893211. The cubic root of 55577247 is about 381.6210687333.

The spelling of 55577247 in words is "fifty-five million, five hundred seventy-seven thousand, two hundred forty-seven".