55216375 has 32 divisors (see below), whose sum is σ = 73831680. Its totient is φ = 41104800.

The previous prime is 55216373. The next prime is 55216393. The reversal of 55216375 is 57361255.

It is not a de Polignac number, because 55216375 - 2¹ = 55216373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55216375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55216373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158952 + ... + 159298.

It is an arithmetic number, because the mean of its divisors is an integer number (2307240).

Almost surely, 2^55216375 is an apocalyptic number.

55216375 is a deficient number, since it is larger than the sum of its proper divisors (18615305).

55216375 is a wasteful number, since it uses less digits than its factorization.

55216375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 438 counting only the distinct ones).

The product of its digits is 31500, while the sum is 34.

The square root of 55216375 is about 7430.7721671439. The cubic root of 55216375 is about 380.7932988745.

The spelling of 55216375 in words is "fifty-five million, two hundred sixteen thousand, three hundred seventy-five".