55011615 has 16 divisors (see below), whose sum is σ = 89680608. Its totient is φ = 28785536.

The previous prime is 55011599. The next prime is 55011641. The reversal of 55011615 is 51611055.

It is a cyclic number.

It is not a de Polignac number, because 55011615 - 2⁴ = 55011599 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33804 + ... + 35393.

It is an arithmetic number, because the mean of its divisors is an integer number (5605038).

Almost surely, 2^55011615 is an apocalyptic number.

55011615 is a deficient number, since it is larger than the sum of its proper divisors (34668993).

55011615 is a wasteful number, since it uses less digits than its factorization.

55011615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69258.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 55011615 is about 7416.9815288970. The cubic root of 55011615 is about 380.3220146724.

The spelling of 55011615 in words is "fifty-five million, eleven thousand, six hundred fifteen".