55345215 has 16 divisors (see below), whose sum is σ = 89382528. Its totient is φ = 29240736.

The previous prime is 55345211. The next prime is 55345223. The reversal of 55345215 is 51254355.

It is a happy number.

It is not a de Polignac number, because 55345215 - 2² = 55345211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55345211) 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, 15637 + ... + 18846.

It is an arithmetic number, because the mean of its divisors is an integer number (5586408).

Almost surely, 2^55345215 is an apocalyptic number.

55345215 is a deficient number, since it is larger than the sum of its proper divisors (34037313).

55345215 is a wasteful number, since it uses less digits than its factorization.

55345215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34598.

The product of its digits is 15000, while the sum is 30.

The square root of 55345215 is about 7439.4364705937. The cubic root of 55345215 is about 381.0892454942.

The spelling of 55345215 in words is "fifty-five million, three hundred forty-five thousand, two hundred fifteen".