6125994221 has 4 divisors (see below), whose sum is σ = 6142418172. Its totient is φ = 6109570272.

The previous prime is 6125994187. The next prime is 6125994223. The reversal of 6125994221 is 1224995216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1713049321 + 4412944900 = 41389^2 + 66430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6125994221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6125994223) 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, 8211416 + ... + 8212161.

It is an arithmetic number, because the mean of its divisors is an integer number (1535604543).

Almost surely, 2^6125994221 is an apocalyptic number.

It is an amenable number.

6125994221 is a deficient number, since it is larger than the sum of its proper divisors (16423951).

6125994221 is a wasteful number, since it uses less digits than its factorization.

6125994221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16423950.

The product of its digits is 77760, while the sum is 41.

The square root of 6125994221 is about 78268.7307997261. The cubic root of 6125994221 is about 1829.7518471679.

The spelling of 6125994221 in words is "six billion, one hundred twenty-five million, nine hundred ninety-four thousand, two hundred twenty-one".