55381784 has 16 divisors (see below), whose sum is σ = 109949400. Its totient is φ = 26061952.

The previous prime is 55381771. The next prime is 55381819. The reversal of 55381784 is 48718355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203474 + ... + 203745.

Almost surely, 2^55381784 is an apocalyptic number.

It is an amenable number.

55381784 is a deficient number, since it is larger than the sum of its proper divisors (54567616).

55381784 is a wasteful number, since it uses less digits than its factorization.

55381784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407242 (or 407238 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 55381784 is about 7441.8938449833. The cubic root of 55381784 is about 381.1731611158.

It can be divided in two parts, 55381 and 784, that added together give a palindrome (56165).

The spelling of 55381784 in words is "fifty-five million, three hundred eighty-one thousand, seven hundred eighty-four".