55136215 has 4 divisors (see below), whose sum is σ = 66163464. Its totient is φ = 44108968.

The previous prime is 55136189. The next prime is 55136227. The reversal of 55136215 is 51263155.

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 55136215 - 2⁵ = 55136183 is a prime.

It is a Duffinian number.

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, 5513617 + ... + 5513626.

It is an arithmetic number, because the mean of its divisors is an integer number (16540866).

Almost surely, 2^55136215 is an apocalyptic number.

55136215 is a deficient number, since it is larger than the sum of its proper divisors (11027249).

55136215 is a wasteful number, since it uses less digits than its factorization.

55136215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11027248.

The product of its digits is 4500, while the sum is 28.

The square root of 55136215 is about 7425.3764214348. The cubic root of 55136215 is about 380.6089382631.

The spelling of 55136215 in words is "fifty-five million, one hundred thirty-six thousand, two hundred fifteen".