54215215 has 4 divisors (see below), whose sum is σ = 65058264. Its totient is φ = 43372168.

The previous prime is 54215207. The next prime is 54215221. The reversal of 54215215 is 51251245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54215215 - 2³ = 54215207 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 54215215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5421517 + ... + 5421526.

It is an arithmetic number, because the mean of its divisors is an integer number (16264566).

Almost surely, 2^54215215 is an apocalyptic number.

54215215 is a deficient number, since it is larger than the sum of its proper divisors (10843049).

54215215 is a wasteful number, since it uses less digits than its factorization.

54215215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10843048.

The product of its digits is 2000, while the sum is 25.

The square root of 54215215 is about 7363.0981930163. The cubic root of 54215215 is about 378.4777862270.

The spelling of 54215215 in words is "fifty-four million, two hundred fifteen thousand, two hundred fifteen".