55389455 has 8 divisors (see below), whose sum is σ = 72509904. Its totient is φ = 40283200.

The previous prime is 55389431. The next prime is 55389463. The reversal of 55389455 is 55498355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55389455 - 2²⁰ = 54340879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503486 + ... + 503595.

It is an arithmetic number, because the mean of its divisors is an integer number (9063738).

Almost surely, 2^55389455 is an apocalyptic number.

55389455 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55389455 is a deficient number, since it is larger than the sum of its proper divisors (17120449).

55389455 is a wasteful number, since it uses less digits than its factorization.

55389455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007097.

The product of its digits is 540000, while the sum is 44.

The square root of 55389455 is about 7442.4092201383. The cubic root of 55389455 is about 381.1907592267.

Subtracting 55389455 from its reverse (55498355), we obtain a square (108900 = 330²).

The spelling of 55389455 in words is "fifty-five million, three hundred eighty-nine thousand, four hundred fifty-five".