55325215 has 8 divisors (see below), whose sum is σ = 72425808. Its totient is φ = 40236480.

The previous prime is 55325213. The next prime is 55325261. The reversal of 55325215 is 51252355.

55325215 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 55325215 - 2¹ = 55325213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55325213) 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 in 7 ways as a sum of consecutive naturals, for example, 502902 + ... + 503011.

It is an arithmetic number, because the mean of its divisors is an integer number (9053226).

Almost surely, 2^55325215 is an apocalyptic number.

55325215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55325215 is a deficient number, since it is larger than the sum of its proper divisors (17100593).

55325215 is a wasteful number, since it uses less digits than its factorization.

55325215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005929.

The product of its digits is 7500, while the sum is 28.

The square root of 55325215 is about 7438.0921613005. The cubic root of 55325215 is about 381.0433354538.

The spelling of 55325215 in words is "fifty-five million, three hundred twenty-five thousand, two hundred fifteen".