55561394 has 24 divisors (see below), whose sum is σ = 97314048. Its totient is φ = 23722440.

The previous prime is 55561391. The next prime is 55561409. The reversal of 55561394 is 49316555.

It is not an unprimeable number, because it can be changed into a prime (55561391) 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, 29567 + ... + 31389.

It is an arithmetic number, because the mean of its divisors is an integer number (4054752).

Almost surely, 2^55561394 is an apocalyptic number.

55561394 is a deficient number, since it is larger than the sum of its proper divisors (41752654).

55561394 is a wasteful number, since it uses less digits than its factorization.

55561394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 2143 counting only the distinct ones).

The product of its digits is 81000, while the sum is 38.

The square root of 55561394 is about 7453.9515694697. The cubic root of 55561394 is about 381.5847804172.

It can be divided in two parts, 55561 and 394, that added together give a palindrome (55955).

The spelling of 55561394 in words is "fifty-five million, five hundred sixty-one thousand, three hundred ninety-four".