55215 has 16 divisors (see below), whose sum is σ = 98400. Its totient is φ = 29376.

The previous prime is 55213. The next prime is 55217. The reversal of 55215 is 51255.

It is an interprime number because it is at equal distance from previous prime (55213) and next prime (55217).

It is not a de Polignac number, because 55215 - 2¹ = 55213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70 + ... + 339.

It is an arithmetic number, because the mean of its divisors is an integer number (6150).

2⁵⁵²¹⁵ is an apocalyptic number.

55215 is a deficient number, since it is larger than the sum of its proper divisors (43185).

55215 is a wasteful number, since it uses less digits than its factorization.

55215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 417 counting only the distinct ones).

The product of its digits is 250, while the sum is 18.

The square root of 55215 is about 234.9787224410. The cubic root of 55215 is about 38.0790138006.

The spelling of 55215 in words is "fifty-five thousand, two hundred fifteen".