6215993 has 6 divisors (see below), whose sum is σ = 7230906. Its totient is φ = 5327952.

The previous prime is 6215987. The next prime is 6216011. The reversal of 6215993 is 3995126.

It can be written as a sum of positive squares in only one way, i.e., 6210064 + 5929 = 2492^2 + 77^2 .

It is not a de Polignac number, because 6215993 - 2⁶ = 6215929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6215933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63380 + ... + 63477.

It is an arithmetic number, because the mean of its divisors is an integer number (1205151).

Almost surely, 2^6215993 is an apocalyptic number.

It is an amenable number.

6215993 is a deficient number, since it is larger than the sum of its proper divisors (1014913).

6215993 is a wasteful number, since it uses less digits than its factorization.

6215993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126871 (or 126864 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 6215993 is about 2493.1893229356. The cubic root of 6215993 is about 183.8668795323.

The spelling of 6215993 in words is "six million, two hundred fifteen thousand, nine hundred ninety-three".