5215555 has 4 divisors (see below), whose sum is σ = 6258672. Its totient is φ = 4172440.

The previous prime is 5215547. The next prime is 5215559. The reversal of 5215555 is 5555125.

It is a happy number.

5215555 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5215555 - 2³ = 5215547 is a prime.

It is a Duffinian number.

5215555 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5215559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521551 + ... + 521560.

It is an arithmetic number, because the mean of its divisors is an integer number (1564668).

Almost surely, 2^5215555 is an apocalyptic number.

5215555 is a deficient number, since it is larger than the sum of its proper divisors (1043117).

5215555 is a wasteful number, since it uses less digits than its factorization.

5215555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043116.

The product of its digits is 6250, while the sum is 28.

The square root of 5215555 is about 2283.7589627629. The cubic root of 5215555 is about 173.4203971718.

The spelling of 5215555 in words is "five million, two hundred fifteen thousand, five hundred fifty-five".