55883561 has 12 divisors (see below), whose sum is σ = 57965040. Its totient is φ = 53859960.

The previous prime is 55883549. The next prime is 55883563. The reversal of 55883561 is 16538855.

It is not a de Polignac number, because 55883561 - 2¹⁰ = 55882537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55883563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264746 + ... + 264956.

It is an arithmetic number, because the mean of its divisors is an integer number (4830420).

Almost surely, 2^55883561 is an apocalyptic number.

It is an amenable number.

55883561 is a deficient number, since it is larger than the sum of its proper divisors (2081479).

55883561 is an equidigital number, since it uses as much as digits as its factorization.

55883561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 337 counting only the distinct ones).

The product of its digits is 144000, while the sum is 41.

The square root of 55883561 is about 7475.5308172731. The cubic root of 55883561 is about 382.3208861365.

The spelling of 55883561 in words is "fifty-five million, eight hundred eighty-three thousand, five hundred sixty-one".