55615215 has 8 divisors (see below), whose sum is σ = 88984368. Its totient is φ = 29661440.

The previous prime is 55615213. The next prime is 55615247. The reversal of 55615215 is 51251655.

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

It is not a de Polignac number, because 55615215 - 2¹ = 55615213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55615213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1853826 + ... + 1853855.

It is an arithmetic number, because the mean of its divisors is an integer number (11123046).

Almost surely, 2^55615215 is an apocalyptic number.

55615215 is a deficient number, since it is larger than the sum of its proper divisors (33369153).

55615215 is a wasteful number, since it uses less digits than its factorization.

55615215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707689.

The product of its digits is 7500, while the sum is 30.

The square root of 55615215 is about 7457.5609283465. The cubic root of 55615215 is about 381.7079513532.

The spelling of 55615215 in words is "fifty-five million, six hundred fifteen thousand, two hundred fifteen".