55029215 has 4 divisors (see below), whose sum is σ = 66035064. Its totient is φ = 44023368.

The previous prime is 55029203. The next prime is 55029251. The reversal of 55029215 is 51292055.

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 55029215 - 2¹² = 55025119 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

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, 5502917 + ... + 5502926.

It is an arithmetic number, because the mean of its divisors is an integer number (16508766).

Almost surely, 2^55029215 is an apocalyptic number.

55029215 is a deficient number, since it is larger than the sum of its proper divisors (11005849).

55029215 is a wasteful number, since it uses less digits than its factorization.

55029215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005848.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 55029215 is about 7418.1679004994. The cubic root of 55029215 is about 380.3625694640.

The spelling of 55029215 in words is "fifty-five million, twenty-nine thousand, two hundred fifteen".