6216121255 has 16 divisors (see below), whose sum is σ = 7571561184. Its totient is φ = 4898588800.

The previous prime is 6216121231. The next prime is 6216121273. The reversal of 6216121255 is 5521216126.

It is not a de Polignac number, because 6216121255 - 2⁷ = 6216121127 is a prime.

It is a Duffinian number.

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, 68244 + ... + 130726.

It is an arithmetic number, because the mean of its divisors is an integer number (473222574).

Almost surely, 2^6216121255 is an apocalyptic number.

6216121255 is a deficient number, since it is larger than the sum of its proper divisors (1355439929).

6216121255 is a wasteful number, since it uses less digits than its factorization.

6216121255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62786.

The product of its digits is 7200, while the sum is 31.

The square root of 6216121255 is about 78842.3823523871. The cubic root of 6216121255 is about 1838.6814410280.

The spelling of 6216121255 in words is "six billion, two hundred sixteen million, one hundred twenty-one thousand, two hundred fifty-five".