55086213 has 16 divisors (see below), whose sum is σ = 90398336. Its totient is φ = 29056320.

The previous prime is 55086211. The next prime is 55086271. The reversal of 55086213 is 31268055.

It is not a de Polignac number, because 55086213 - 2¹ = 55086211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55086211) 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, 100618 + ... + 101163.

It is an arithmetic number, because the mean of its divisors is an integer number (5649896).

Almost surely, 2^55086213 is an apocalyptic number.

It is an amenable number.

55086213 is a deficient number, since it is larger than the sum of its proper divisors (35312123).

55086213 is a wasteful number, since it uses less digits than its factorization.

55086213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201804.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 55086213 is about 7422.0086903749. The cubic root of 55086213 is about 380.4938477608.

The spelling of 55086213 in words is "fifty-five million, eighty-six thousand, two hundred thirteen".