55331215 has 8 divisors (see below), whose sum is σ = 69284448. Its totient is φ = 42340320.

The previous prime is 55331197. The next prime is 55331251. The reversal of 55331215 is 51213355.

55331215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55331215 - 2¹¹ = 55329167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55331215.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 240456 + ... + 240685.

It is an arithmetic number, because the mean of its divisors is an integer number (8660556).

Almost surely, 2^55331215 is an apocalyptic number.

55331215 is a deficient number, since it is larger than the sum of its proper divisors (13953233).

55331215 is a wasteful number, since it uses less digits than its factorization.

55331215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481169.

The product of its digits is 2250, while the sum is 25.

The square root of 55331215 is about 7438.4954795980. The cubic root of 55331215 is about 381.0571096275.

The spelling of 55331215 in words is "fifty-five million, three hundred thirty-one thousand, two hundred fifteen".