55388474 has 4 divisors (see below), whose sum is σ = 83082714. Its totient is φ = 27694236.

The previous prime is 55388471. The next prime is 55388479. The reversal of 55388474 is 47488355.

55388474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34164025 + 21224449 = 5845^2 + 4607^2 .

It is not an unprimeable number, because it can be changed into a prime (55388471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13847117 + ... + 13847120.

Almost surely, 2^55388474 is an apocalyptic number.

55388474 is a deficient number, since it is larger than the sum of its proper divisors (27694240).

55388474 is a wasteful number, since it uses less digits than its factorization.

55388474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27694239.

The product of its digits is 537600, while the sum is 44.

The square root of 55388474 is about 7442.3433137689. The cubic root of 55388474 is about 381.1885087963.

The spelling of 55388474 in words is "fifty-five million, three hundred eighty-eight thousand, four hundred seventy-four".