215040055 has 16 divisors (see below), whose sum is σ = 274881600. Its totient is φ = 160932352.

The previous prime is 215040053. The next prime is 215040061. The reversal of 215040055 is 550040512.

It is a cyclic number.

It is not a de Polignac number, because 215040055 - 2¹ = 215040053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215040053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6621 + ... + 21769.

It is an arithmetic number, because the mean of its divisors is an integer number (17180100).

Almost surely, 2^215040055 is an apocalyptic number.

215040055 is a deficient number, since it is larger than the sum of its proper divisors (59841545).

215040055 is a wasteful number, since it uses less digits than its factorization.

215040055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15338.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 215040055 is about 14664.2440991686. The cubic root of 215040055 is about 599.1098420549.

Adding to 215040055 its reverse (550040512), we get a palindrome (765080567).

The spelling of 215040055 in words is "two hundred fifteen million, forty thousand, fifty-five".